I'm still busy totally revamping my house so my attention to RiscOS world has been very occasional. However:
Flypig : The reason why the enter key does not tab between fields is that I have not done it. I will add it to the list but will implement it using the recommended style.
Helpful : You can drag a folder of images to Thumbcat ("real time" mode) and generate an HTML catalogue from that.
A general point to note here. When a file or folder is dragged to Thumbcat a temporary catalogue is built in scrap. The procedures treate this catalogue like any other and so you can (or rather should, if not tell me !) do anything you would with a saved catalogue. This also includes exporting the EXIF data as a text file. Yes I have thought about importing the same type of data and building an EXIF file from any image format......but don't hold your breathe.