Hi Rolf,

re:
> The error comes not from clicking the PDF, it comes from inside Mixcraft (help menu).

I see, but the normal way for a program to open a PDF file would be to use the system ShellExecute() function which should function the same as double clicking on it in the file Explorer.

What happens if you use the Windows Run dialog (Win+R keyboard shortcut) and put in the PDF file name with full path in it, does it launch Edge or MoI?

If only Mixcraft is launching MoI and not any OS shell functions then that would point to a bug in Mixcraft where it must have some custom code manually going through the registry instead of calling the system ShellExecute() function like it ought to.


> I really don't know why this is happening, but MOI-5 seems to have changed a setting in the
> registry (which then is stuck there even after uninstall of MOI).

It's normal for Moi to put file association information in the registry when it is installed. I'll see about making that get uninstalled.

If you go in regedit to HKEY_CLASSES_ROOT\.pdf there should be a sub-key "OpenWithProgids" that then contains an entry "MoI.PDFFile.1", if you delete the "MoI.PDFFile.1" maybe that will make Mixcraft not try to open MoI for handling .pdf files.

- Michael