What midlandsmafia says is true, but for newbies, I would strongly recommend maintaining separate PGP programs so there's less chance of accidentally mixing them up. This happened to SS and I'm sure others. It's the reason why Tor is distributed as a separate browser rather than a Firefox add-on like it used to be. Accidental privacy leaks are too easy. I recommend using GPG4USB which is portable and can be extracted anywhere. So extract one copy into a folder called Work and another copy into a folder called MY SUPER ILLEGAL SHIT and you're much less likely to get them mixed up.