Try the beta 5.2.2 .. it's stable & has some nice additions beyond LW 5.1. You will find a link to the LW 5 beta on right side of your personal pro download page. Also, under the Tools menu is an advanced Search option, check it out.

Of course if you preferred LW 4 you can always revert back to it also. It can be found on the classic versions link on your pro page.