I have no folders in the artwork control form, and cannot add any subclasses to the film folder, with PCB editor ver 15.7

15.7 was operating fine on an XP system, we moved to a faster win7 (pro) machine.we upgraded to 16.5 then 16.6 all functioned fine.

we needed to use 15.7 for a certain client, and reloaded it on the win7 machine.

any help is appreciated,

Thanks,

Tom