Attention! After updating RadioPlanner to version 2.1_201202, be sure to delete the old clutter data and also delete the base map cache files. The easiest way to do this is by clicking on the corresponding "Delete" buttons in the program settings:
Important information for installing the update RadioPlanner 2.1_201202
How we can assign frequency channels against each site in Mlink planner?
How we can calculate interference analysis in Mlink planner?