As far as I can determine Steve, the various versions of this do not over-write the previous version. I can only guess that what they have done with this is created new additions in the succeeding versions rather than a full replacement. MS what can you say
I have everyone of the versions from 1.0 all the way up to 3.0 installed and all show in the Add/Remove Programs.
It appears from what you are saying is that your 1.1 version isn't installed right for some reason, so I would go ahead and install it and I would also get 3.0. I am not using 3.5 (latest) yet as there seemed to be some doubt about it working right with Hoster and I haven't confirmed it yey with mine.