There are no plans to charge for an update to Macabinet. Certainly not any time soon (for 2.0).

The $10 price hike was debated for quite some time here. Eventually it was decided that $20 was a nice price-point. (And existing users who purchased it before the increase, obviously, do not need to pay any extra.)

Macabinet is receiving a LOT of development and graphic design time right now. The fruits of which will be very apparent before long. The small increase in price helps to offset that cost for us.

It's also worth noting that one can purchase Macabinet, DiscBlaze and the rest of our applications for only $35. We try to keep things as cheap as possible for our users while still allowing us to put food on the table.