This is driving me nuts!! After installing BorisFX Continuum (3.0.4)
it will allow me to use the filters/generators for only one session
in FCP 4.5. If I quit FCP, next time I open up I get an error
message saying I need to re-install. Please can anyone shed light
on this problem.
You should contact their customer support line. It is a known issue and they can get you taken care of even though I didn't see their hotfix on the website.
Until you get a hold of a fix, all you have to do is delete your FCP POA cache before launching FCP. It is located in Home folder > Library > Preferences > Final Cut Pro User Data > Final Cut Pro POA Cache. UNfortunately, you will have to do this everytime you launch FCP until you get the fix... but at least you can get your work done.