i need to revoke all of the permissions from one plugin but i am unsure of how to do that. i have tried oxide.revoke group admin pluginname.* but this does not work, i dont want to revoke all permissions. Also is there a file where i can edit these permissions? thanks

Permissions may not be modified via file.  The command usage you specified is correct and currently supported.  We will likely need more information.

What plugin ?

PermissionsManager will do it.

Do '/perms group admin', click the plugin you want to deal with, then click 'revoke all'.