Can't Remove Shares

[StealthNet]

Hi there!

I am trying to uninstall sonarr, radarr and docker from my AS1004T...

Successfully uninstalled all apps, then mono, then docker.

Last step: removing the shares.

That is when the problem appears: when I try to remove the /Download share, it says it is being used by sonarr-docker and radarr-docker.
If I try to remove the /Docker share, the error is the same.

Any ideas?

AS1004T 3.5.2.RAG2

Thanks!