How to make a clean installation

Backup existing data using the Backup Restore feature
Close any open instances of ArthaChitra.
Goto Start > Control Panel > Program > Uninstall a program
Select "ArthaChitra 2" and click on Uninstall
Backup existing data: Either Rename (if you have not made a backup of your data) or delete the folder <My Documents>\ArthaChitra 2\
Download and install ArthaChitra