The bug is affecting the Active-X control used by the TD software to show file dialogs, font dialogs, and color dialogs. When the TD attempts to call the various dialogs, nothing happens. This is why it appears as if the Load, Save, and Save As... buttons don't work. The TD calls on the file dialog, and since it doesn't work the TD gets back a "null" value, which is what it gets back when one presses Cancel on a file dialog, so the TD assumes that you've canceled your action. Thus, nothing happens.
As far as I know, it shouldn't have any other effect.
... or find any of my templates, plus my receipt count went back to 1.
OK, two different issues, but they could be related. First, the TD software will never, ever delete any of your saved templates or tournaments, or anything else. It just won't do it. So, either your templates are still there (somewhere) or something
else deleted them. Based on the second part of your statement, it sounds like your preferences file was reset. I honestly cannot see how this could be related to the main issue. Regardless, if your preferences were reset then your receipt count would go back to 1, and if you're using a different Data Store than the default Data Store, it's possible your Data Stores configuration was reset, and therefore pressing "Load Template" on one of the various tabs would, by default, show a different folder than you were previously using to store your templates, which would make it look like they've gone missing. Of course, since the main issue here was affecting you, pressing "Load Template" would not have done anything, so you must have been looking for a template some other way...