Bartender2 is configured using commands. If you in your chatbox type "/bar", it should be able to guide you onwards from there with what to type next. "/bar help" can be useful, too.
Nevertheless, if memory serves, you can use "/bar lock" to toggle the lock and thus enable you to move the bars around, and "/bar bar1", "/bar bar2", etc. will show you commands to configure bar 1, bar 2, etc.. The overall sequence is ALWAYS "/bar cmd1 cmd2 cmd3 cmd4", if commands 2 and 3 and 4 exist. For example, by typing "/bar bar4 show off" you disable bar #4, and with "/bar bar3 rows 4" you give bar #3 four rows instead of the stock one - very useful if you have a Razer Naga mouse.
I hope this helped. When in doubt, just type /bar and it will guide you on.