At some point updated to latest v4 build (262, I think it is). Re-build database as suggested.
Seemed ok, but checked yesterday and no airports, no airspace, no VORs or NDBs, etc.
Re-build database: nothing.
Removed and re-copied v4 (seems there is no installation program any more?)
Re-build database again; nothing.
Add in additional scenery locations that I could think of.
Re-build database again; nothing.
Can you please review the log file and make some suggestions?
Cheers

Howdy. Just wondering. I've searched the forums but not found an answer. I might be blind. I even searched for "liters" and "litres" in the manual. How desperate is that!
Anyway, is it possible to use litres for fuel in aircraft profiles, rather than US gallons?
Cheers

I've found that when I connect Plan-G to P3Dv2 on the same computer, the FPS drops through the floor (from 20-40fps down to 7-15 fps, on average) and the performance in P3Dv2 is 'jittery'.
If I disconnect then I get my performance back. This stops me from using Plan-G as a moving map.
Any ideas?

After re-installing my whole laptop and going with P3Dv2 I lost the right-click "set this as active leg" option from the plan table. Most frustrating.
Here's the problem:

The icon that is auto-populated to the desktop by the installer simply has the registered Plan-G 'application' as a target. I've seen this before: with an icon like that where the application is referenced and not the specific executable, you are not able to set it to run as administrator, either by right-clicking when launching or by setting the advanced property.

I created a new icon by navigating to the actual executable and dragging a shortcut to the desktop. I can now set advanced properties to run as administrator. In doing so, I now have the "set as active" menu option back.

Hope this helps someone else searching for this answer.

Case closed, cheers!