The missing files bug is solved.
There is still a "JDownloader has no connection to the updateserver" Problem.
This is usualy caused by a software called hamachi. We are working on a solution there as well.
Workaround: disable the hamachi network adapter. We recommend this in any way. Hamachi uses the 5.*.*.* IP Range. update.appwork.org is 5.9.113.110 and cannot be reached if hamachi is installed.
So.... anyone else having update Problems? Please test it before writing "yes"