Hi Christoph,
Siva is indeed correct. Automatic upgrade path was set from 1.1/1.1.1 to 2.0.
1.0.X is considered very old, most like the content would be better off re-written in the simplified form
(Also a good intro into to 2.0).
If you still need that upgraded anyway - Please contact me directly. We took off all links to older versions, so you might
find it hard to do the two-phase upgrade if you don't happen to have 1.1/1.1.1
Cheers,
Yaron Haimsohn