I have MarketPress for the main site only, but it creates the default pages on all new sites!

On the main site it is impossible to delete the "sign up" page that I don´t use cause its just for products display. And every time someone creates a new site The "Store" page and the "Sign Up" page are created. The plugin is not NetworkWide enabled, But it was before. I just want it to work for the main site and for it not to create the default pages on all the sites of the BuddyPress/Multisite!!

Can you help me please?

Thank you! donmcint.