If you copied files any configuration files from the old install they likely contain invalid paths unless the original install and the new install have identical paths.  The prompt for a user is common when Pegasus Mail is confused by an invalid path somewhere.  Adding to that is the concern over whether both installs are as single-user, multi-user, or one of each.

If your old install was not in a Program Files directory then post back because that move is pretty straightforward.  If it was, your best option (only reliable option IMHO) is to do a clean install to C:\PMAIL, configure it just enough to get a mailbox directory created, and then copy ONLY data files from the old install using the whitepaper as a guide. 

I installed w32-472.exe in Win7 64bit on a new PC.  I have the same version installed on in XP 32bit on a different partition. It looks like I need to copy the following folders to the new PMAIL folder. 

Defaults

Dicts

IERenderer

Mail

PNG

Resource

And  PMAIL.CFG to the Pmail\Programs folder

What else do I need to copy over?

Thanks,

Docfxit         

There is a white paper in the downloads area of this site that serves as a guide for moving an installation of Pegasus Mail. I think you will find it helpful.  The direct link is:

http://community.pmail.com/files/folders/whitepapers/entry41852.aspx

IMPORTANT:  Make certain the new installation was not inside of either of the Program Files directories on the Win7 OS.  Built-in file protections prevent Pegasus Mail from working correctly.

Also,  I strongly suggest creating a new pmail.cfg file by running the pconfig32.exe utility.  Pmail.cfg is one of the few Pegasus Mail files that is not readily editable.  One character out of position will break it.

Thank you,

Docfxit