>>- Convert the SCX to text (SC2) with FoxBin2Prg and back to SCX: Sometimes the VCX/SCX table have some corruption in metadata that can cause this problems (normally, duplicated records). Others have solved this kind of problems (look at Msg.ID 1634833)
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>I haven't yet tried your program - can you please post a link and tell if it would preserve a very complex form based on a class with ActiveX? Of course, I do have backups (in TFS).
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Yeah, here it is:

https://vfpx.codeplex.com/releases/view/116407

For a quick setup, please read this help page:
https://vfpx.codeplex.com/wikipage?title=FoxBin2Prg

It is on Thor tool too, in case you use it, and in it there is an option that create some "SendTo" shortcuts for you.