I love the new launcher Soly and Cyane!
A little tip for users that have a controller rather than the keyboard:
The first time I tried to open two PSO windows on different accounts, I noticed that the controller was controlling both windows rather than just the one in the foreground. To remedy this, I started the client that I didn't need the controlelr in (mag feeding for instance) first, with the controller unplugged. Once that was started, I plugged the controller back in, and started the playing client, and the controller now works only in the one window.