Like I deleted my yahoo toolbar nowe I can’t get it back and I need it really bad?

I want to get the yahoo toolbar but want to make sure its good. Does it screw up your computer or is it ok to use?

I have the latest version of the Yahoo Toolbar for Internet Explorer installed on three different machines. When I look at the custom buttons on each of these toolbars they are all different. Are the buttons stored locally somewhere that I could access and copy to the other machines or is there a way to make the same custom buttons appear on each toolbar without having to recreate them on each machine?

I log in to the toolbar using the same Yahoo account on all three machines. I also have the same problem between two different windows logins on the same machine.

Thanks in advance for any help.