Hi @Sat
If your Studio does not launch at all, it can be that the download was not completed properly. It can happen if you close your Studio too fast after switching to Beta channel. You could try checking the Beta folder under:
c:\Users\%userprofile%\AppData\Local\UiPath\
If it looks incomplete (as if, the size or number of files drastically differs from the stable release folder), simply delete it and relaunch Studio. It should work then.