>>>Tried as admin with no success, but actually it was working without admin rights before 8.1.
>
>OK, it could be a Molebox versioning issue but as per previous, Molebox is ineffectual protection for a VFP app anyway. Have you considered Defox or VFP Compiler? The protected product can be installed by xcopying a handful of files to a folder on the destination machine and they're both far too difficult to hack even for the sorts of C++/VFP guru who can disassemble the ASM or C++ to figure out what is happening.

We have hundreds of customers, so I can't trust VFP C++ compiler at this time.I just wait for others to test... :)
Maybe Defox + another .EXE, DLL wrapper would be a better solution. What about Refox on Defox protected files?

>No matter what protection you use, watch out for use of external encryption dlls. If you rely on one of those, your encryption keys can be hooked from a VFP app the moment you access the dll, without bothering to decompile the rest of the app.

I add dll files too into Molebox wrapper. Isn't that a good protection?