Hi Wilson,
I used your file attachment to reinstall V3 (if it's in what NAV quarantined on me, I don't see it), and I got the PGO3 back again.
Regarding ...
You should be able to import your V3 (.mdb) database files into V4 using File--> Import from Folder
In the Import window at the far bottom right there is a file type filter dropdown which is set by default to .pg4
You will need to select .mdb to see your old V3 database files.There was no dropdown for me.
But, playing around a bit, I got a Groups Import box to pop up. Using the Browse there I found xxxxx\Documents\PG Offline\PGO\ygroups.mdb. Then I was able to select the group (the one on V3) to import.
It worked ...Next question ...
The group I just imported from V3 stopped at 95K messages when Neo came along. I just closed that group this June (it duplicates what's on the group I still have going...and the fewer Yahoo headaches I have, the better...I closed a number of them) at 117K messages.
Is there a way I can
Refresh that group on V4 -- just from 95K to 116K?
Thanks for your patience and all your help.

~~ Stephanie