[issue]Cubase doesn't remember any Plug-in


I can’t work on my cubase 8 because every single time I open it, it lose every plug in that I have in my computer, and every time I have to rescan in my pc from the plug in manager! It also crash doing it a lot of times!! I don’t know What can I do, if I knew, I wuold not update it from cubase 7!!! I think that only an update will correct some errors, Sorry for my english. Do you have any ideas?

what system you using?