This is the only official way to continue playing Farmville 2 after the Flash shutdown occurs. It sounds like you've already discovered Farmville 2 Launcher +, which is Zynga's official solution to the impending Farmville 2 shutdown. However, many clever and wonderful people have been working on archiving old Flash games, and some game companies have released non-Flash updates in order to preserve their games. (It would also require a great deal of programming experience.) The Flash shutdown really, really sucks for older Flash games, including some of my own favorites. Unfortunately, there's no current (legal) way to disable the Adobe Flash killswitch, and I would obviously not recommend trying to illegally 'crack' copyrighted games unless you want angry lawyers coming your way.