You can generally reinstall a program that has lost its uninstaller so you can get back the uninstaller.
Your Uninstaller! 2010 is the best I have found.
I am impressed by everyone who updates in Beta. When I started with the full release of V4, I stayed with that version until -- well actually I am still using it.
I will start v5 when the betas are finished. And, even then, I won't update in v5 unless it is a major improvement or has a function I really need. I generally uninstall before I install a new version with AC. Not so with other software. But, I really find it rather tedious to go through that entire process as often as Jon puts out new updates. That's not a bad thing, just what I do.