Texmaker and TeXstudio ⇒ Can't uninstall Texmaker

[mac67]

Hi,

I have Windows 10. I have Texmaker 4.3 and would like to upgrade to 4.4.1. Unfortunately, Texmaker does not appear in the list of apps in the panel control (other apps, such as Libre Office, Mathematica, are missing, too).

Some time ago I read something about uninstallation problems due the number of characters (60+) in the register key.

Anyone can help? Thanks.