I have encountered few things.
1. cfg file have not been created, but ok i created it myself and configurate it
2. without cfg it kind of worked but you could buy for example 5 inferno and after creating cfg file you couldn't buy any nades
3. after deleting plugin files i still can't buy nades. When i buy them i loose money game thinks that i bought them but i don't have them
After deleting the plugin and restarting server i reinstaled it and .cfg file got created. Everything worked exept that bug that parthi mentionned. I'm waiting for the fix because this plugin is awesome