Doesnt work !

After 1 month of my complaint, nothing has been done and its crystal clear that this software company is not paying attention for the reviews. I will ask Apple to refund me and I will buy other SIP software. As simple as this, but its important all users be aware of this situation. It follows the original complaint in December 21 2012:
I used this software for a couple of weeks but from the last upgrade on, whenever I try to do a SIP call, the app closes ! This happens in the iPhone and iPad.
Hope someone solves this or I will change to a better sip client.

Eduardo S. about iSip -VOIP Sip Phone, v4.9