Removed all users from User Access

Good day to you all!

I was trying to 'lock down' the Admins for an encrypted folder by having a Group as the only listed entry.

So I have removed all users and made the AD group as the Admin, but have now realized that I can't add or remove users, re-encrypt folder etc.

Is there anyway to add a user now that only the group has access (I am a member of the group)?

Or am I going to have to start again? (copy the files to a non-encrypted folder etc)

Any help would be appreciated.