@MeneerJansen Hmm... If you load it in 0.49 then you will see in the Terminal (in red) all the objects that could not be created when you open the patch.
Make a list so you can then try to find them.
You could download extended and not install it. You can then search that downloaded folder for the missing objects, to find the names (always the folder name and almost always a subfolder of the "extra" folder) of the libraries that you will need.....
Nothing working........
Any object missing (not created) could stop it working.
Open the top menu "Media".... "Test audio and Midi".....
Is anything going on?
Do you have DSP........ Audio turned on?
David.