hi
i’ve updated Fabfilter plugins but when i load my old project unfortunately i got this message (The plug-in “FabFilter Pro-Q 2” could not be found) , although that plugins have been installed !
my old project not running correctly 
Cubase 5
i have notice that , problem only happen for Pro-Q 2 because I was already insert it from ( Eq ) category drop-menu .
what im gonna do now ?
There are VST2/3 versions. Try installing both and see if it will be found again.
ohhh ! many thanks . solved
Great! 