My browsing history disappeared after this update. It also happened after updating the portable version. The History file continues at 21,184KB and I can see that the old information is still there. Has anyone else had this problem?

@redfox-cz: I also had this problem about stop working and after disconnecting the synchronization it stopped crashing.
After a few minutes I reconnected the synchronization, my Opera was at least about 40 minutes completely locked and returned to working normally.

Thanks for the update.

I would like to know if it is possible to add more functions in native ad-blocking?
It would be nice to have the 'Disable blocking on this Tab' option contained in this extension:
https://addons.opera.com/en/extensions/details/contentblockhelper/
This works as a temporary unlock, no need to disable ad-blocking or create exceptions just because of some sites.