Password to protect from other computer users

I would sugest a way, (it doesn't matter which one) to protect my smartftp, history, favorites, etc to be used by the othe peopel who works with me. I know that when i'm not at the office they use my history and favorites to download what they wnat, and i'm going to kill someone Grrrr

Greatings from Spain.
Your program, it's simply the best, it's incredible what i can do with only one instance of the program, i've been using it the last two years, and your work it's great, much better each day.
Lots of thanks

PookY