Since I posted this a month ago inside another topic and didn't get any replies, I'm making this a topic to see if someone can give me some feedback.
I found out that if I try to load an image in the picture editor, that is bigger than my system's/monitor's resolution, it simply won't load. The same way if I resize the picture editor's canvas to a size bigger than my system's/monitor's resolution, the canvas immediately gets cleared. I'm using 1024x768, so if I try to load or make the canvas something like 200x769 (1 pixel taller than my resolution) everything gets cleared. The same happens for the width.
I changed my system's resolution to 1152x864, and was able to load bigger images (1152x864 max size). However when I changed my resolution back to 1024x768 construct crashed.
Is this happening to someone else?
*Normally I could split the image into several objects, but since I'm trying to load a big texture for a mesh object, I'm not able to do it.