So, the same thing happened to me, and I too stumbled upon this solution and it did work, and appeared to fix v. 1.0.4 for me. I was able to start it after opening v. 1.0.3.
Thanks for the update. I was just wondering about the inimanager, good to see it's close. Had to recently reinstall X Plane and all my add-ons, gonna wait for the A300 V2 before I reinstall that. The A310 should keep me company in the meantime.