Ok, I just downloaded and installed Site designer 2.5 in a separate folder from 1.5, and successfully opened my 1.5 site in it. ( looks fine ) Now I need to see if it converts ok.

I don't believe this. I purposely installed 2.5 in a separate folder labeled 2.5, so it wouldn't overwrite 1.5, and now the 1.5 folder is empty, so it did anyway.

Hi Melissa, I believe the install file automatically uninstalls the older version. Before you open any projects you may want to re-download 1.5. I have both versions on my desktop, if it doesnt work I would open a support ticket with CC

I have RSD 2.5 and SDV3 both running at the same time now. But unfortunately, it doesn't allow copying of elements from the old, and pasting into the new. Please see my other thread and contact me, though.