The earlier upgrade setup for version 6.1.0.2, had a minor bug. If you did not stop the Email Capture service and Folder Monitor service while upgrading to version 6.1.0.2, an error message was displayed during the installation, hence causing the upgrade to fail.
We have now fixed this bug. So know when you upgrade to version 6.1.0.3, there is no need to stop these services, the upgrade setup will do it for you.