Your error log shows you have an outdated version of the program, which is not normally possible, since our installer will always automatically download the current one.
DO NOT remove folders manually, removing Simobjects when the scenery is stil installed will only result in big stuttering caused by the missing simobjects.
- Uninstall everything, both FSDT and Flightbeam. Reply YES to the question "Do you want to remove the Addon Manager ?"
- Reinstall all the FSDT sceneries, using ONLY the current version of the installers. DO NOT install with older installers.
- Reinstall all the Flightbeam sceneries, using ONLY the current version of the installers. DO NOT install with older installers.
As usual, be sure to install with the Antivirus disabled, and configure it to exclude the whole Addon Manager folder from scanning.