Help me big Bug

am trying to update to the latest version of GDT, 1.3.14, and right as it reaches the end of installation the following error pops up.

C:\Program Files (x86)\game Dev Tycoon\GameDevTycoon.exe

An error occurred while trying to rename a file in the destination directory: MoveFile failed; code 2. The system cannot find the file specified

Click Retry to try again, Ignore to skip this file (not recommended), or Abort to cancel installation.

I initially thought this might be due to having forgotten to uninstall the previous version prior to updating, but after uninstalling the problem persists. I am running the install executable as administrator, and have deleted the empty GDT folder from the directory. This problem does not occur when installing the previous version I was using, 1.3.9

and a run avast

Have you tried this?

I would also suggest reading;
http://forum.greenheartgames.com/t/solutions-anti-virus-false-positives-eg-avast-norton-bitdefender/6124/

And be sure to create an exception!