Manually Assign a drive letter - Unavailable Feature

I've been trying to follow the tutorial to fix a huge issue that I've been having on giving my Windows-installed programs access to files they already have.

My best bet is to use the solution indicated on this tutorial:

https://kb.parallels.com/116127


Disable Automatic Letter Assignment
Although this step is not necessary, it will prevent you from having duplicates that are shared automatically.

1. Open the machine's configuration > Options > Sharing > Share Mac > Advanced and uncheck Assign a drive letter to shared folders.


So, the stuff I've written in RED is not available. There's just no "Advanced" button.

Yes, Parallels is updated to its latest version.