So I finally found a solution. It has worked for me and several others experiencing the same problem.
The launcher and the repair tool seem to be downloading incorrect versions of three key game files. Fortunately, I had installed MWO on my laptop while I was in Egypt a week ago, and was able to copy the correct files from my laptop to my main computer.
I will share these files below so that you can try to replicate my solution:
1. Run the Repair Tool, using the Cog icon in the launcher.
- If you can't even get the launcher to run, you will find MWORepairTool.exe in ..\Piranha Games\MechWarrior Online\Bin32.
-
Here is a copy of MWORepairTool.exe if you can't find your own.
2. Put
this file in ..\Piranha Games\MechWarrior Online\Bin32 (replacing the incorrect version of MechWarriorOnline there).
3. Put
this file in ..\Piranha Games\MechWarrior Online\Bin32 (replacing the incorrect version of MWOClient there there).
4. Put
this file in ..\Piranha Games\MechWarrior Online\Bin64 (replacing the incorrect version MWOClient there there).
Don't mix the files up. While the files in step 2 and 3 have the same name, they are the 32-bit and 64-bit versions of the main game client respectively.
Let me know if this works for you. If it does I will put up a thread for the benefit of others.
Edited by Appogee, 07 January 2015 - 09:32 AM.