.. and said to use the Ion Cube version, which is what I installed. I transferred the files using CuteFTP Pro 7.0. I also tried uploading the latest "loader" files (in forced binary mode) as described here:
I think I'm getting somewhere now... I re-uploaded all of the php files that were in the main /calendar directory (and those in the /functions) directory making sure I used "force binary" mode and I'm finally being prompted to create an admin password etc.