Hello.
As for the first issue, we managed to reproduce it in our labs and we’re working on a fix.
To investigate further the second problem we would need log files. You can gather them as explained in https://www.nomachine.com/AR07K00677 and send them to forum[at]nomachine[dot]com.
About the third issue, that setting should be saved in a cookie. Do you have cookies enabled on your browser?