Most could see this being a bit faster than having to close the game first, then open the Plutonium Launcher again on their own.
For example: Choosing "Multiplayer" in the menu would give the option of "Are you sure you want to enter Multiplayer?" followed by "Yes" and "No." Choosing yes, the game would close, and automatically re-open the launcher, checking for updates and eventually opening "Multiplayer" like that.
It would also be cool if there was another setting inside the actual game menu for enabling or disabling automatic update checks. This would fix most "Pin the plutoniumlauncher" to Taskbar tutorials as later it would just be that "Go to game settings [of whatever game you're in], and deactivate 'Automatic Updates.' Yes, this may mean your game will soon be incompatible with game servers at one point if it doesn't work, but by then, you can choose the "Update Launcher" option in the plutonium menu" kind of stuff.