docsavage20:I just did an O/S reinstall and find that the unlock codes for MJPEG activation and upgrade to PS9-Plus don't work. Now what?
If you have done an O/S reinstall and then installed Studio you will probably have to re-register your software to get certain functions to work because your Studio Passport number will probably have changed.
Registration is free and is found under the Help menu.
If you have also previously purchased any "Activation Keys" these are yours in perpetuity, but you may have to re-generate them for the new install. Regeneration is also under the Help menu and as long as you still have the same email address as when you last generated them then you should not have a problem. Again, as they have been previously purchased then regeneration is free.
Try going to Help - Regenerate Activation Keys, in Studio, and read the information there and see if that helps.
If you are still having problems after the above, post back again