problems with photosweeper

restore your backup form before this occurred

I had been told the PhotoSweeper was updates and safe - sounds like that is wrong and it should not be used

PowerPhotos and Duplicate Annihilator are up to date and are safe to use with Photos

LN

If you use a computer with out having a backup you are 100% guaranteed to lose things - people make mistakes - software fails - hard ware fails - and when those happen with no backup you are out of luck -- do you drive with no insurance and not putting your seat belt on because GM told you their car was safe

You need to immediately get an external hard drive (TimeCapsule is a good choice) and start running TimeMachine all the time so you have hourly backups - if you do not you will lose more data in the future

For now it is possible that software like FileSalvage can find the missing photos and you can start a new library with what you have and the ones FIleSalvage or other similer software can find

LN

That is unfortunate.

Yes. Next time, don't empty the trash before verifying that a change didn't hose your data.