What platform? You may have to do this manually, or do an overlay reinstall of Kodi, leaving "Stalker Client" off the included pvr clients list. It's easy in Windows, android not so much.
Yeah, do a reinstall of Kodi, don't delete your settings and addons, and where it asks for components to install, just leave "Stalker Client" off, instead of installing all of them.
I don't know if the issue happens all that often, to be honest. I'm actually looking to reduce the number of stickies. I have both clients installed, but never run them concurrently. A regular uninstall of a built in pvr is probably hindered because the program files folder is adminstrator controlled.
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