PSE 2020 - problem installing third party plugins.

[#1]

Since installing PSE 2020 I am not able to install third pary plugins - and have had to uninstall and re-instell 4 times due to error messages. I used the normal procedure I have always used when installing plugins manually. At one stage there was a suggestion that the plugins may not be working because they were used in a previous version?? My previous version was 2018. When I attempted to open a photo from my desktop I was told there was a problem with the generator and the photo could not be loaded.

Welcome any advice.

Can anyone explain why every time I open PSE 2020 I am offerd more updates to do with Camera Raw - even though I have previously updated.