Very useful.
One suggestion: How about capturing which programs have which active hot keys, by having the program capture this whenever programs come to the fore, eg, by a delta with previous active keys. Put the program path in a new column, "Path", but if there is already an entry in "Path", then create a new entry for the key(s) with the new Path filled. This would be in addition to the Notes.
This would naturally be incomplete, as current apps will shadow new apps, but over time, could approach a complete picture.
tOM