Delete member type completely

Hi, great plugin!. I’m trying to use it but I made a mistake creating custom member types. I’ve deleted all the member types created and I deactivated and deleted your plugin hoping to clean all. So installed again your plugin and creating the same name member type the scenario is:

The counter for that member is already a number of that type user created before deleting your plugin and no members matched in it.

Matching members with the new installation of your plugin, the counter are a sum of the old + new members showing just the latest member created of course..

How could I clean members type to reuse them?

Thank you for any advice..