So the actual inflation rate is closer to 2%.  If they raised it 2% you wouldn't complain?  Are you also complaining to your local stores about the cost of toilet paper?  Did you switch brands because the old brand was getting too expensive? 

Everybody would love prices to stay the same forever.  I recently bought a new F150 and I would love to have paid the same price that I did for the first new F150 I bought back in 1981.  Unfortunately price increases are a part of life in our wonderful world.  Your choices are to either shop for a better software elsewhere or grin and bear it.  If you do go elsewhere, make sure that new company will guarantee you in writing that they will never raise their prices in excess of the current US inflation rate.