I think you should 3bet this 55 pre flop vs CO. Your SB vs CO 3bet range should be like 22-55, some suited connectors, JJ+, AK,AQs. There you have value and bluff 3bet range. If villain has high fold to 3bet you can 3bet even wider range. Otherwise that hand is well played. BB is short stack and will call pretty much anything, CO can have strong draws, 2 pair, TP + BDFD, overpairs and maybe even 33 which you beat? Villain must be very very tight for you to be able to fold this hand.
I think the best thing about software is that you can improve your own game with it. You will see your own stats and see if you for example fold too much to cbets or do not 3bet enough. Without software you can't identify your leaks easily and fix them.
