I am not with Laminar Research; just a flight simmer.
In viewing the link for the Log.txt file it suggests to me that you have not loaded the software to the desktop or created a independent X-Plane directory. The location I read is into the D:\Programs File\x-plane\.... directory.
There are several comments in earlier forum Q&As advising this is a no-go directory and will/could cause problems with conflicting files such as you are experiencing.
Try loading X-Plane direct to the desktop or to a new directory as D:\X-plane.... and forget about any other location. The best option is if you have an additional dedicated drive just for X-Plane. Have a look at the on-line version of the manual for further instructions which can be found at http://x-plane.com/manuals/desktop/
Do you need the Beta version? Download the officially released 11.11 (?) version and try. The beta version is for testing purposes and is usually downloaded as an additional "try me" arrangement into another directory to prevent any conflict with the official release version.