For what it's worth...
I've owned a personal license of SW Pro since 2005.
I let the subscription lapse on July 2012.
Here are the two renewal choices I now have due to the new backdating policy...
Renew Before Jan 01, 2016: $1,995.00
Renew After Jan 01, 2016: $5,607.92
Almost triple the price.
Just thought I'd share.