I had a couple of problems with Win CC, missing a template.tmp file someone zipped & sent me, then wouldn't open.
Ended up completely uninstalling Win CC AND Automation License Manager (with deleting all files & settings when prompted) & then doing a complete reinstall - tried repairing the install & modifying it but no change. After that it works OK, just remember to check your license after you close Win CC because on mine it sometimes still shows the lis'c as USED & I have to reopen Win CC, reopen a project, close the project & close Win CC - then the lis'c checks OK.