Powerpoint always ask to save

[Mariguoo]

Hello! Since version 2.0.2.0 when I close a presentation always ask me to save changes even though I didn't make any change. It only happen when I close the presentation directly from keyboard, but closing from Oscpoint works fine. Is there any way to avoid this?
Sorry if this is already answered, I try to search information and I only could find this #48.
Thanks a lot for the answer and for the software!