The title speaks for itself I think. On hyper uninstall, the context menu integration is not removed. I haven't been able to do it manually either, so if anyone can tell me how to do that (I have tried finding it in the registry, but there's no entry for it there), that would be much appreciated.
I was able to remove the entry manually in the registry at [HKEY_CLASSES_ROOT\Directory\Background\shell\Hyper]. Maybe someone finds that useful.
Whoops, didn't mean to close the issue.
I wanted to add that I uninstalled Hyper through the "Apps & Features" settings.
For me the option was remaining in HKEY_USERStoo. I think that's because I by default use a non-admin Standard user. Make a search for "Open Hyper Here" by doing Ctrl + F in the registry editor if anyone wants to find all the remenants in the context menus.
It was present at location Computer\HKEY_USERS\<Windows generated Very long ID>\Software\Classes\Directory\Background\shell\Hyper
Tested on latest canary, seems to be fixed, no results on searching 'Open Hyper here' in registry after uninstall.
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I was able to remove the entry manually in the registry at [HKEY_CLASSES_ROOT\Directory\Background\shell\Hyper]. Maybe someone finds that useful.