I too recently upgraded from 8.5 to 2010 Mac VW and needed to update some active jobs. This is how I did it:
1. Saved files for update on thumb drive and plugged into new computer.
2. Opened drive and selected file to be updated - right click and selected VW2010 from pop-up "Open With" menu.
3. VW2010 launched the 8.5 file, then saved it as 2010 file.
Note: Just clicking on the 8.5 file will not launch 2010 for some reason.
You may also try opening VW2010, selecting "new" in the file menu, navigating to the desired 8.5 file, then "open" to launch the file. Either way it is a tedious chore if there are many files to upgrade.
Good Luck.