>>I'm using VFP 7.0
>>
>>I'm currently having a problem with "set classlib to myBase.vcx in myLibraries.exe".
>>If I leave my Development directory alone, the exe runs fine, but if I rename my Development folder then the exe crashes "Cannot find myDevelopmentFolder\myBase.vcx".
>>
>>Obviously the program is picking up the path to my Development version of myBase.vcx and using it.
>>How do you prevent an exe from using the Development version of files without renaming the Directory?
>>
>>TIA
>
>Run it on a separate machine.

Or, if you don't have another real PC handy, use VMWare or Conectix Virtual PC (a technology recently bought by Microsoft).

http://www.vmware.com/

http://www.connectix.com/index_win.html

Take a look at this article to have an idea:
http://www.levelextreme.com/Magazine/October2002/Page32.asp

Hope this helps,