All 300 polls except one deleted on update, after using the menu item that allowed to upload the old data. All 30,000 votes replaced with bogus votes attributed to the remaining poll. Your help is seriously needed.
I was able to resolve the issue by installing the current version of YOP-Polls on my new website and importing the old data.
This is on a site that has not been updated since its creation in late 2016. YOP-Poll version is 5.8.0 and WP 4.7.21. I do not see a way to share a screen grab. In the download of the Logs, the answer column contains numbers instead of the word answers I see in the backend.