Setting the default for opening files

My Mellel documents are opening in Mellel Lite by default. I would like my
.mellel documents to open in Mellel, not in the Lite version. What can I do to have Mellel as the default programme opening documents?

To set Mellel as the default for opening any type of document (not just Mellell documents) simply select a document of this type (in our case, a docuemnt with .mellel filename extension) in the Finder and choose File > Get Info (cmd+I).

In the Document Information window you'll see the Open With option, which you can set to have all documents of this type opened by Mellel.