I uninstalled it while I'm working on a project. Can I co-install it. I tried a couple of times and got the same result so I am pretty sure I can reproduce it.
I guess that the two issues you found are related. I wasn't able to reproduce them. You can install the new version together with an older version. Make sure to install it to a different folder.
It will be helpful as up until now you are the only one to report this issue. There is probably some conflict with your project and the new IDE.