I upgraded to 1.2 from 1.1. However I could not see the new enhancements available for the charts (e.g. display chart value, legend position, etc.). I solved it by deleting the Analysis-config and Analysis-workspace folders in my Users folder and then reinstall the 1.2 DS client.
If you do this, make sure to backup your local development and repository folder in the workspace. Otherwise you will lose all your local development.
I had to reconfigure connection to the BI Platform after the reinstall.
My solution may as well be an overkill, someone might know the exact folder to be deleted to clear this "cached" configuration.