Response from the site administrator
Vladonai, 14.09.2011
Yes, you'll get all minor upgrades for free. Plus, we guarantee, if major upgrade will be released within month you'll have it (and all minor upgrades for it) for free.
Also note: so far we didn't release any paid upgrades - the upgrade from version 1 to 2 was free, we only reserve our right to introduce upgrade price in the future.
You can find all the details here - http://www.vladonai.com/allmynotes_product_buy_upgrade.php