Marketpress store page

Since Marketpress is not yet working correctly on my multiwordpress/buddypress, and so I network-deactivated after I had network-activated the plugin. Unfortunately, I notice the effect of network-activated had automatically create a new page known as store to all users' blogs. When network-deactivated the plugin, the store page was not removed. How am I going to solve this?

Also, on the main page which is main site such as mydomain.tld/store/ shows page not found even though marketpress plugin was activated. Funny thing is that normal blogs of users have store page function correctly, but admin's main site isn't. How to solve this?