Notausstieg0309, there was a caching issue. This has now been fixed and you should be able to download 2.0.0p2 of the trial for the Checkmk Enterprise Edition over there.
Martin’s tip of replacing p1 and p2 only worked for the Raw and Enterprise versions. In 2.0.0p2 there has been a slight change in the naming convention of the trial version, that is why it resulted in a 404.
Sorry for the inconvenience.