Is it possible that the jump to time component is gone since version 0.8 because I can't find it in the installer nor in the components menu. Also I'm using the classic menu and I don't want to use the seek bar... Does anyone has an idea to manage this?

It's included in normal installer, but is disabled in components menu. Go to preferences -> core -> main menu items -> [group] components. Right click, insert item -> command... and choose jump to time. Now it should be visible in components menu. If not, make sure foo_stfu.dll is in components directory. If it isn't then download if from:
http://www.foobar2000.org/foo_stfu.zip

Many thanks WILU! Downloading the component did the trick, because the jump to time component isn't included in the special installer...