Wont stop closing app!!!

I really like this app, it is really great for making textures, but Ill be right in the middle of doing a texture, and the app will close + not save the stuff I just did. (This happens like 6 times per separate block texture) It will reopen, but like I said the work I just did will be gone. This is VERY frustrating and needs to be fixed!!!!! if you guys fix this I will give 5 stars but right now it is impossible to use when it constantly closing and deletes your work.

Djfdhfjdhsbl about Texture Creator Pro Editor for Minecraft PC Game Textures Skin