SKAPPLIN At about $90 plus USD this is a bit expensive compared with other freeware or shareware database utilities. Filemaker's Bento is only $50 USD, for example. EagleData is freeware, and iListData is $70 USD, and iData is $70 USD. Then there is MySQL and they many free access and form creation software to use with MySQL.
Your product is relatively new, contains obvious problems as noted by the other replier, and is more expensive. I think you may want to reconsider your pricing policy. Perhaps a single-user license for $30-50 USD may be more competitive.
I would think that Filemaker's Bento at $50 USD is a major competitor not to mention a mature and relatively problem-free product. Given the choice which would you buy?
(Version 1.0.3)