Thanks for reaching out!
1) Are you on a Windows PC?
2) Did you install it to a very deep folder? (E.g. C:/a_very_long_foldername/and_another_one/aiimages/)
If 2 is the case, copy it to a higher folder (E.g. C:/Data/) and unzip it there again. Or use the itch.io/app to install aiimages. :)