Well this is a new one. Unfortunatly I don’t have an answer. I just built a development disk with Qt and Visual Studio which is using the 2017 Redistibutable. I just deleted the 2005 and 2013 versions to make sure it wasn’t using one of those, and Fritzing still starts fine for me using the 2017 Redistributables. You might try deleting all the Fritzing files (assuming you don’t have any sketches or parts that you want to keep) and see if a reinstall helps. As well as the files that loaded from the zip file there are two user directories that don’t get updated if the program is reinstalled (although that doesn’t usually cause this particular problem):
There are two user directories (with your parts and the parts database) which don’t get touched during an install (to not affect your sketchs during upgrades). On Windows they are in
c:\users\username\AppData\Fritzing\roaming\Fritzing (which is a hidden directory so you need to enable hidden directories in explorer) and
c:\Users\username\My Documents\Fritzing (where username is your windows id)
If you don’t have any parts or sketches you want to keep you can just delete those two directories and Fritzing will recreate them, or you can move them aside by renaming them if you wan to keep something in them.
If that works, the first launch of Fritzing will appear to hang (as it updates the parts database from github). Just wait until it completes, it will eventually tell you there are new parts available, as interrupting it is what causes you to need to delete the two files above usually.