Hey. You're smart! :)

When I originally programmed this, I only allowed shortcuts that reference a single tag (ie. aliases) to be writable. I didn't see why anyone would want to write all tags in a shortcut at the same time, and I didn't want to add a potentially dangerous ability like this unless it was useful. (Dangerous because it would be possible to accidentally modify a number of tags at once.)

But you've found a use for this, which is cool. Also, I've just realized this is is a great way to delete a bunch of different tags at once, which is something a lot of people do (especially when trying to remove all information from a TIFF image).

So I have added this feature and it will be available in version 6.00 when released. Version 6.00 will be a production version, and I want to test it out as thoroughly as practical before release. If you want to help in the testing, you can download the 6.00 pre-release and try it out.

Thanks for the suggestion.