Can iFix 3.5 run on Windows 7

Is anyone running iFix 3.5 on Windows 7 successfully?

I have about 20 iFix 3.5 nodes on Windows XP.
Company wants to Migrate to Windows 7.
Cost to upgrade keys is beyond plant budget.

Has anyone run iFix 3.5 on Windows 7 successfully?
Any suggestions welcome.

PLC's are A-B SLC, PLC-5 and ControlLogix.