How do you upgrade from Domino 8.5.1 FP1 HF42 64 bit to FP3?

I couldn’t install fp2 or fp3. Perhaps I need to uninstall HF42, but how? Thank you.

Subject: Run the HF43 installer again. It should provide an option to revert back to plain FP1. Then run the FP3 installer.

Subject: *worked perfectly. thanks again.

Subject: *thank you!

Subject: unisntall?

Did you try uninstalling the hotfix?

Subject: *that is one of my questions. “Perhaps I need to uninstall HF42, but how?”