I actually have stuffit lite 3.5 as well though it also won't work. it says "Simcity.SIT does not appear to be a stuffit archive. Continue working with is? Yes No. If I click Yes it says "This archive has been corrupted. You may be able to unstuff some of the items but will no longer be able to change this archive." This is not my idea of fun. Well good luck trying to remember that program name.