The option in Dreamweaver to associate a Git Repository with my site is gone. The Git tab is blank with no task icons.
I have been using this functionality for years without issue. Today I open up Dreamweaver and the option is grayed out. I have made no changes to my computer other than Windows 10 update.
If you think that the only change to your system could have caused the problem to Dreamweaver, then go back to another restore point.
If you, like I, doubt that the upgrade has had an effect on Dreamweaver, then have a look at what you are not doing. As an example, have you followed https://helpx.adobe.com/au/dreamweaver/using/git-support.html#main-pars_header_625288958 and the rest of that document?