BEFORE UPDATE, PLEASE DELETE YOUR CONFIG AND SAVE THE PERMISSIONS AND BLOCKS LIST SOMEWHERE, you'll need to do it to make the changes works
Changelogs:
Some minor changes in the config
Now the GUI automatically change the size to fill the blocks
If there're more blocks than permissions (or opposite), obviously there''ll be problems, so now when you do a command of the plugin or break a block in the list, you'll get an error and nothing will happen, to fix it you'll need to make the size of the blocks and permissions list the same.