to ensure that 3.6 works fine if you wish to keep 3.5 as well make a duplicate copy of your palace folder and put 3.6 in it. i have several clients. if needed ill make instructions on how to install them all within few folders.
the download link for 3.5 is www.thepalace.com
you can also get a registration code on thepalace.com now that the site has came back online.
after the holidays ill upload more of my palace packages (alternate clients, scripts, and more)