I have the same issue. I reluctantly purchased two personal licenses to get around the issue. Unfortunately their systems aren't set up to deal with multiple

I have the same issue. I reluctantly purchased two personal licenses to get around the issue. Unfortunately their systems aren't set up to deal with multiple personal licenses and it requires a call to their sales department every time I renew. Now I am bouncing among 3 machines and getting frustrated again but buying a third license just to get rid of the message is not an option. I am not 'using' the instances simultaneously but it's incredibly inconvenient to keep opening and closing the IDE as I change from one machine to another. I understand the need to protect their source of revenue but there really needs to be a better solution than this.