Can you tell me where your data folder is, is it a network drive or something. There's nothing else that would cause this problem - nothing gets set by opening a 5.20 example that remains set while opening up an older job file.
It might be best to addresses this via e-mail (the back and forth communication would be faster). Also, if you generate the 1st e-mail from the "Help Menu", it will include a lot of your system information (OS, memory, and video) details that we usually ask for.
The e-mail will be addressed to "techsupport@coade.com", but please reference this Discussion Thread.
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Regards,
Richard Ay - Consultant