vst manager problems?

I am having some problems with the vstmanager, when I updated my Waves plugins from v.7 to v.8 the manager still say v.7 is there and enables, I can see the v.8 but I am not able to enable it. Is there some preference file that store the vstmanager settings that I can delete and start fresh to import my vst plugins?
Regards Ulrik
Regards Ulrik