I purchased "MacX Video Converter Pro" from a company called Digiarty Software, Inc. It installed OK and I used the trial period from awhile to see if it worked. Since it seem to do what I wanted it to do I decided to purchase the product. However, after a few days I kept getting a message stating that my "YouTube engine was out of date." I cliked OK thinking that I would be taken to their site where I could obtain a fix. No such luck. I was take to thier original site that only gave one the "oppotunity" to repurchase the product. There are no "fixes." Next, I e-mailed support three times to inquire about this problem. No response. On thier website they states that: "Due to superior quality and service..." and "For us, the greatest satisfaction from customers is our primary concern." Sure!
I did some research on this company and discovered that they market thier "products" through a company called "Avengate" located in Amsterdam. Avengate is a conduit for develpers to market thier products. When one goes to the Digiarty website it looks exactly like a MAC software site but I'm very suspicious of this since on a real MAC software site there is no problem in receiving a response if one has a technical issue.
I would avoid this company like the plague. If one expects "support" forget it as I believe it's a bait and switch.