[Zubersoft]

I was able to download the file, and I was able to remove annotations on the pages you mentioned without any crashes. I've tested on five different pages and removing annotations and saving the changes has not resulted in any crashes or errors. I do notice that the call into the PDF library to save the file seems to be taking a large amount of time. That usually points to the file being very unoptimized or having other issues with the way it is constructed. Optimizing the file or rebuilding it in a tool like Adobe Acrobat can often fix that. Regardless, I can't reproduce a crash, so I'm not sure what steps I should take to reproduce what you were seeing. As a side note, I've been using the single page display mode which only displays a single page at a time in the editor. If you've been using a different display mode, let me know. It doesn't seem to me like that should matter, but I'd like to test in the same fashion as you if possible.

Thanks,
Mike