Hi llegrand - appreciate your views...of course you do not know the background of the software I want to license limit and why. Boils down to 2 things, 1) it was built with commercial software (due to the originating customer requirements) that costs me a substantial amount per year to have paid support/updates for and 2) It is a niche product that fits medium/larger organisations and they are sometimes - in my experience - quite reluctant to take on open source (or open source derived software).
As for open source being free, well it often is but with the option to donate if one likes the product...something I am quite likely to do for Abatecart as it one of the better open source stores, in my opinion.
Returning to subject
I would have thought a password option for a digital download would have been a core requirement and not something which needed an add-on ....