Thanks Kirk,
All possible workarounds, but very hands on, and of varying levels of practicality. All the scenarios you describe are possibilities of when/why I would want to update a catalogue.
With every other cataloguing program I've used/use, you just have a re-synch or update option, which I assume must compare the file folder contents with the index, and then update any changes or additions. So every so often you can hit the sync/update and bring everything up to date, or simply schedule an overnight update without having to manually keep track of where you might have made changes or additions.
I guess, I will just need to leave it running overnight to rescan the whole folder/sub-folders of files, until an update/sync tool is added. Updating on an ad hoc basis, as you suggest, would always leave me wondering whether everything was up to date.
Cheers,
Graham