Fusion 5: Could not open /dev/vmmon:... after Yosemite installation

I've been using an Ubuntu VM under Fusion 5 for quite a while.  I installed OSX Yosemite today and can no longer start this VM.

I get:

Could not open /dev/vmmon: No such file or directory.

Failed to initialize monitor device.

Cannot find a valid peer process to connect to

I've searched several threads including

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1003484

1) I am not running any VPNs or similar services

2) I tried Repair Disk Permissions and Reboot - no fix

3) I tried restoring a snapshot - same errors

4) I uninstalled Fusion, deleted a bunch of recommended files, downloaded and reinstalled it - no fix

Addendum 5): I downloaded another Ubuntu image and installed it.  It will not start - same errors

Suggestions appreciated.