Thanks to tech_head! Nitro should give you a lifetime license just for this one comment.
I have had this issue since the day I installed V10. I do a fair amount of scrolling through pages of scanned documents as well as a lot of cropping and Nitro has been freezing for 30 seconds or more for the past couple of years. I have lost many many hours of productivity waiting for the unnecessary disk writing. I think I wrote the original ticket on this issue. I have had multiple sessions with Nitro engineers, using screen sharing so they could watch me demonstrate the issue and they did know it appeared to be due to some disk writing activity but they were never able to figure out why (after two years). One engineers comment while watching me demonstrate the problem was "wow, that's reeeeeally bad". Yep. Nitro even created a group of customers who were experiencing the issue to comment on any details we could provide, but even with their efforts, all I ever heard them say was "we can't recreate the issue".
I just followed tech_head's suggestion above to create a PIPLog.txt folder and did about an hours worth of editing with no freeze ups at all. FINALLY. I wonder why this this log file exists. It would be ironic if it is used by support to help identify issues and it is in fact cause of the issue.
Now that the problem file has been identified, at least my specific version of the issue, maybe Nitro can make some progress.
My PIPLog.txt file was 14.2 MB, which seems extremely large for a text file. I opened the file in Notepad and Notepad froze for about 15 seconds while it opened the file. I'm guessing that this file isn't supposed to be nearly this big and the huge size explains why Nitro freezes when it writes to it.
Nomde