It runs until the end, then crashes instead of looping. Most times it sends a crash report and it recovers as a copy. I can run the original after the recovery, but it crashes at the end. Impress also will not let me save any changes. The crashes started gradually over the past couple of weeks, becoming more frequent and problematic.
Please test with Menu/Help/Restart in safe mode
Ran in Safemode: I was able to make & save my changes, even reduced the size of the document. Continues to crash 100% of time at the end of loop when not in Safemode.
Then try uninstall and reinstall.