I found two issues with the launcher.
Issue#1:
Initially when I was downloading the beginners content from learners tab it frequently use to hang (without showing not responding) and slow down my PC. I was facing net issues during the time as long as my net is good it does not trouble my overall PC performance but when internet speed goes slow it troubled me a lot.
Issue#2:
After downloading the content and creating projects using the downloaded content and tested them I left launcher open and went to sleep (so did my laptop). Next day morning when I observed the memory in task manager that launcher has occupied more than 2GB RAM which I found very unusual. It settled after I restarted launcher and I never seen launcher eating up that much memory since last 3-4 days.