I seem to be having the same problem as described in https://portableapps.com/node/24926 . I bring up a New Event dialog box, fill it all in and then try to save it and nothing happens. Nothing shows up in my calendar, but no error messages are generated either.
I've tried all the things suggested in the previous thread with no luck. There is one difference I've observed. My local.sqlite file does not seem to be updating. The size stays the same (79KB) after I try to save the new event. The Date Modified time stamp on that file updated about a half hour ago, but I don't know what triggered that. I've tried repeating everything I've done so far to see what updates the time stamp, but so far, nothing I've tried has updated the Date Modified.
All my files and folders from Profile on down have the read-only bit clear. The local.sqlite file has the Archive bit set.
(Sorry for duplicate post. I thought I was creating a new topic when I posted to the previous thread.)