X-plane 9: Cannot start engines on any A/C nor will running engines keep running

Question

Running x-plane 9 on osx 10.6.8 for many years without problems, using CH basic yoke, mostly fly c172. Suddenly engine will not start or keep running. No failures set, engine running when opening program selected, fuel in tanks, mixture rich etc.... None of the A/C engine will start, or continue to run if initially running such as starting on final approach etc. I'm completely out of ideas!!! Reinstalled X-plane in a new folder but the same problem. Something somewhere must be set to disable all fuel flow? Help please!

Answer 1

When people have inexplicable issues on X-Plane 10, the first things to try are

1. Move preferences folder to desktop & restart to restore defaults. This fixes mysterious key assignments, preferences, and the like.

2. Move plugins folder to desktop & see if that fixes the issue.

Try that with v9 and see if it helps.