Updated & tested with Unity 2019.1.8f1

Minor changes.

MA_ToolBox/MA_TextureAtlasserPro/Scripts/Data/MA_TextureAtlasserProAtlas.cs

@@ -1,3 +1,4 @@
+#if UNITY_EDITOR
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
@@ -101,3 +102,4 @@ namespace MA_TextureAtlasserPro
 		}
 	}
 }
+#endif

MA_ToolBox/MA_TextureAtlasserPro/Scripts/Data/MA_TextureAtlasserProQuad.cs

@@ -1,3 +1,4 @@
+#if UNITY_EDITOR
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
@@ -164,3 +165,4 @@ namespace MA_TextureAtlasserPro
 		}
 	}
 }
+#endif

MA_ToolBox/MA_TextureAtlasserPro/Scripts/Data/MA_TextureAtlasserProSettings.cs

@@ -1,4 +1,5 @@
-using System.Collections;
+#if UNITY_EDITOR
+using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEditor;
@@ -10,7 +11,7 @@ namespace MA_TextureAtlasserPro
 	public class MA_TextureAtlasserProSettings : ScriptableObject
 	{
 		[Header("Selection")]
-		public bool autoFocus = true;
+		public bool autoFocus = false;
 
 		[Header("Duplication:")]
 		public bool copySelectedQuadData = false;
@@ -23,3 +24,4 @@ namespace MA_TextureAtlasserPro
 		public KeyCode duplicateHotKey = KeyCode.D;
 	}
 }
+#endif

MA_ToolBox/MA_TextureAtlasserPro/Scripts/Data/MA_TextureGroup.cs

@@ -1,4 +1,5 @@
-using System.Collections;
+#if UNITY_EDITOR
+using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
@@ -17,3 +18,4 @@ namespace MA_TextureAtlasserPro
 		public string name;
 	}
 }
+#endif

MA_ToolBox/MA_TextureAtlasserPro/Scripts/Editor/Utils/MA_TextureAtlasserProIcons.cs

@@ -1,3 +1,4 @@
+#if UNITY_EDITOR
 using UnityEngine;
 using UnityEditor;
 
@@ -33,3 +34,4 @@ namespace MA_TextureAtlasserPro
 		}
 	}
 }
+#endif

MA_ToolBox/MA_TextureAtlasserPro/Scripts/Editor/Utils/MA_TextureAtlasserProUtils.cs

@@ -1,3 +1,4 @@
+#if UNITY_EDITOR
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
@@ -211,7 +212,7 @@ namespace MA_TextureAtlasserPro
 		{
 			if(atlas != null && atlas.selectedTextureQuad != null)
 			{
-				CreateTextureQuad(atlas, namePrefix + atlas.selectedTextureQuad.name, atlas.selectedTextureQuad.rect);
+				CreateTextureQuad(atlas, namePrefix + atlas.selectedTextureQuad.name, atlas.selectedTextureQuad.rect, false);
 
 				if(copyData)
 				{
@@ -378,3 +379,4 @@ namespace MA_TextureAtlasserPro
 		}
 	}
 }
+#endif

MA_ToolBox/MA_TextureAtlasserPro/Scripts/Editor/Views/MA_TextureAtlasserProDebugView.cs

@@ -1,3 +1,4 @@
+#if UNITY_EDITOR
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
@@ -76,3 +77,4 @@ namespace MA_TextureAtlasserPro
 		}
 	}
 }
+#endif

MA_ToolBox/MA_TextureAtlasserPro/Scripts/Editor/Views/MA_TextureAtlasserProInspectorView.cs

@@ -1,3 +1,4 @@
+#if UNITY_EDITOR
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
@@ -132,3 +133,4 @@ namespace MA_TextureAtlasserPro
 		}
 	}
 }
+#endif

MA_ToolBox/MA_TextureAtlasserPro/Scripts/Editor/Views/MA_TextureAtlasserProMenuView.cs

@@ -1,3 +1,4 @@
+#if UNITY_EDITOR
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
@@ -79,3 +80,4 @@ namespace MA_TextureAtlasserPro
 		}
 	}
 }
+#endif

MA_ToolBox/MA_TextureAtlasserPro/Scripts/Editor/Views/MA_TextureAtlasserProViewBase.cs

@@ -1,4 +1,5 @@
-using System.Collections;
+#if UNITY_EDITOR
+using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEditor;
@@ -53,3 +54,4 @@ namespace MA_TextureAtlasserPro
 		}
 	}
 }
+#endif

MA_ToolBox/MA_TextureAtlasserPro/Scripts/Editor/Views/MA_TextureAtlasserProWorkView.cs

@@ -1,4 +1,5 @@
-using System.Collections;
+#if UNITY_EDITOR
+using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using MA_Editor;
@@ -93,24 +94,27 @@ namespace MA_TextureAtlasserPro
 			//Hotkeys.
 			if (curWindow.settings.useHotkeys)
 			{
-				if (e.type == EventType.KeyDown && e.keyCode == curWindow.settings.addQuadHotKey)
+				if(curWindow.textureAtlas != null)
 				{
-					MA_TextureAtlasserProUtils.CreateTextureQuad(curWindow.textureAtlas, "new Quad", new Rect(0, 0, 128, 128), curWindow.settings.autoFocus);
+					if (e.type == EventType.KeyDown && e.keyCode == curWindow.settings.addQuadHotKey)
-					e.Use();
-				}
-
-				if (curWindow.textureAtlas.selectedTextureQuad != null)
-				{
-					if (e.type == EventType.KeyDown && e.keyCode == curWindow.settings.removeQuadHotKey)
 					{
-						MA_TextureAtlasserProUtils.RemoveTextureQuad(curWindow.textureAtlas, curWindow.settings.autoFocus);
+						MA_TextureAtlasserProUtils.CreateTextureQuad(curWindow.textureAtlas, "new Quad", new Rect(0, 0, 128, 128), curWindow.settings.autoFocus);
 						e.Use();
 					}
 
-					if (e.type == EventType.KeyDown && e.keyCode == curWindow.settings.duplicateHotKey)
+					if (curWindow.textureAtlas.selectedTextureQuad != null)
 					{
-						MA_TextureAtlasserProUtils.DuplicateTextureQuad(curWindow.textureAtlas, curWindow.settings.autoFocus);
+						if (e.type == EventType.KeyDown && e.keyCode == curWindow.settings.removeQuadHotKey)
-						e.Use();
+						{
+							MA_TextureAtlasserProUtils.RemoveTextureQuad(curWindow.textureAtlas, curWindow.settings.autoFocus);
+							e.Use();
+						}
+
+						if (e.type == EventType.KeyDown && e.keyCode == curWindow.settings.duplicateHotKey)
+						{
+							MA_TextureAtlasserProUtils.DuplicateTextureQuad(curWindow.textureAtlas, curWindow.settings.autoFocus, curWindow.settings.copySelectedQuadData, curWindow.settings.duplicatedQuadNamePrefix);
+							e.Use();
+						}
 					}
 				}
 			}
@@ -145,3 +149,4 @@ namespace MA_TextureAtlasserPro
         }
 	}
 }
+#endif

MA_ToolBox/MA_TextureAtlasserPro/Scripts/Editor/Windows/MA_TextureAtlasserProCreateWindow.cs

@@ -1,4 +1,5 @@
-using System.Collections;
+#if UNITY_EDITOR
+using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEditor;
@@ -168,3 +169,4 @@ namespace MA_TextureAtlasserPro
 		}
 	}
 }
+#endif

MA_ToolBox/MA_TextureAtlasserPro/Scripts/Editor/Windows/MA_TextureAtlasserProExportWindow.cs

@@ -1,4 +1,5 @@
-using System.Collections;
+#if UNITY_EDITOR
+using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEditor;
@@ -133,3 +134,4 @@ namespace MA_TextureAtlasserPro
 		}
 	}
 }
+#endif

MA_ToolBox/MA_TextureAtlasserPro/Scripts/Editor/Windows/MA_TextureAtlasserProWindow.cs

@@ -1,4 +1,5 @@
-using System.Collections;
+#if UNITY_EDITOR
+using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEditor;
@@ -119,3 +120,4 @@ namespace MA_TextureAtlasserPro
         }
     }
 }
+#endif

MA_ToolBox/MA_Utilities/EditorUtils/MA_EditorGridUtils.cs

@@ -1,6 +1,6 @@
-//Maxartz15
+//https://github.com/maxartz15/MA_EditorUtils
-//Version 1.0
 
+#if UNITY_EDITOR
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
@@ -59,3 +59,4 @@ namespace MA_Editor.Grid
 		}
 	}
 }
+#endif

MA_ToolBox/MA_Utilities/EditorUtils/MA_EditorRectUtils.cs

@@ -1,6 +1,9 @@
-//Maxartz15
+//https://github.com/maxartz15/MA_EditorUtils
-//Version 1.0
 
+//References:
+//http://martinecker.com/martincodes/unity-editor-window-zooming/
+
+#if UNITY_EDITOR
 using UnityEngine;
 using MA_Editor;
 
@@ -68,3 +71,4 @@ namespace MA_Editor.RectUtils
 		}
 	}
 }
+#endif

MA_ToolBox/MA_Utilities/EditorUtils/MA_EditorZoomUtils.cs

@@ -1,6 +1,9 @@
-//Maxartz15
+//https://github.com/maxartz15/MA_EditorUtils
-//Version 1.0
 
+//References:
+//http://martinecker.com/martincodes/unity-editor-window-zooming/
+
+#if UNITY_EDITOR
 using UnityEngine;
 using MA_Editor;
 using MA_Editor.RectUtils;
@@ -37,3 +40,4 @@ namespace MA_Editor.GUILayoutZoom
 		}
 	}
 }
+#endif

MA_ToolBox/MA_Utilities/MeshUtils/MA_MeshUtils.cs

@@ -1,6 +1,9 @@
-//Maxartz15
+//https://github.com/maxartz15/MA_MeshUtils
-//Version 1.0
 
+//References:
+//http://wiki.unity3d.com/index.php?title=ObjExporter
+
+#if UNITY_EDITOR
 using System;
 using System.IO;
 using System.Text;
@@ -89,15 +92,15 @@ namespace MA_Mesh
 			{
 				if(flipY)
 				{
-					Debug.Log("01" + uvs[i].x);
+					//Debug.Log("01" + uvs[i].x);
 					uvs[i] = new Vector2((uvs[i].x / atlasSize.x * textureRect.width) + (1 / atlasSize.x * textureRect.x), (uvs[i].y / atlasSize.y * textureRect.height) + (1 / atlasSize.y * (atlasSize.y - textureRect.height - textureRect.y)));
-					Debug.Log("02" + uvs[i].x);
+					//Debug.Log("02" + uvs[i].x);
 				}
 				else
 				{			
-					Debug.Log("01" + uvs[i].x);
+					//Debug.Log("01" + uvs[i].x);
 					uvs[i] = new Vector2((uvs[i].x / atlasSize.x * textureRect.width) + (1 / atlasSize.x * textureRect.x), (uvs[i].y / atlasSize.y * textureRect.height) + (1 / atlasSize.y * textureRect.y));
-					Debug.Log("02" + uvs[i].x);
+					//Debug.Log("02" + uvs[i].x);
 				}
 			}
 
@@ -185,3 +188,4 @@ namespace MA_Mesh
 		public string textureName;
 	}
 }
+#endif

MA_ToolBox/MA_Utilities/TextureUtils/MA_TextureUtils.cs

@@ -1,27 +1,22 @@
-//Maxartz15
+//https://github.com/maxartz15/MA_TextureUtils
-//Version 1.0
-//Part of MA_TextureUtils
-//https://github.com/maxartz15/MA_TextureUtils
 
+//References:
+//http://www.gamasutra.com/blogs/JoshSutphin/20131007/201829/Adding_to_Unitys_BuiltIn_Classes_Using_Extension_Methods.php
+//https://forum.unity3d.com/threads/contribution-texture2d-blur-in-c.185694/
+//http://orbcreation.com/orbcreation/page.orb?1180
+//https://support.unity3d.com/hc/en-us/articles/206486626-How-can-I-get-pixels-from-unreadable-textures-
+
+#if UNITY_EDITOR
 using UnityEngine;
 using UnityEditor;
 using System.IO;
 using System.Collections;
 using System.Collections.Generic;
 
-//http://www.gamasutra.com/blogs/JoshSutphin/20131007/201829/Adding_to_Unitys_BuiltIn_Classes_Using_Extension_Methods.php
-//https://forum.unity3d.com/threads/contribution-texture2d-blur-in-c.185694/
-//http://orbcreation.com/orbcreation/page.orb?1180
-//https://support.unity3d.com/hc/en-us/articles/206486626-How-can-I-get-pixels-from-unreadable-textures-
-
 namespace MA_Texture
 {
     public static class MA_TextureUtils
     {
-        /// <summary>
-        /// Some base converters and texture settings setters.
-        /// </summary>
-
         public static Texture ConvertToReadableTexture(Texture texture)
         {
             if (texture == null)
@@ -201,3 +196,4 @@ namespace MA_Texture
         #endregion
     }
 }
+#endif