.913 is failing my Norton 360 virus check

I got an error message when trying to install the patch:

Can not delete target file....Fallen Enchantress.exe

edit....restarting my computer fixed my issue.

Well, sometimes an anti-virus will hold up a file, preventing it from being deleted.

You could try installing the patch with your AV disabled. 

Its not unusual to get false positives... it all comes down to trust in Stardock and Patience if you want to wait and see if anyone else has problems.