After updating CC to LR6 I get message that "the program can't start because amtlib.dll is missing from your computer." I tried reinstalling and still get same system error message.My computer is windows 7 professional 64 bit. My old LR was 5.7. Seems I have this or similar problem whenever there is a major LR update. Any help would be appreciated. I think in the past I had to delete all versions of LR in order to install the new version. I hate doing that and having to reinstall actions, etc.