Yyeeah! it works...
Following your hints, I have now deleted a few folders with JBridge and mainly the one I found (using an utility searching for "JBridge") within "Users/Documents/JBridge and containing a number of instructions...
When I now load BiaB 32Bit, I get the same screen as before:
"Registry error/Plse insure this prog. has been installed properly", but...
When I close this screen, I get (free of charge)a new one saying:
"JBridge failed to load proxy", aaannd...
When I close this screen, BiaB (32bit) works as it should, loads midi songs and find a certain number of my old plug-ins among which Forte dxi...
Once again thanks for having shown me the way to salvation!!