Don't part with your money very shady developer. Read the experiences from others bellow:

"I tried to contact the company, but they have no email or phone number on
their website. So I posted in the forum asking for help. The next day, my
account was suspended, my post removed and my name posted on a 'cheats and
liars' webpage (I'm guessing maintained by them as many of the 'cheats' have
the same dollar value next to their names).
Any contact would have been helpful, but they just took my money and then
shut me out. Avoid this company and software or if you need help, you will
be branded a 'cheat and liar'."
http://www.ripoffreport.com/reports/0/310/RipOff0310825.htm

"lastly, he was threatening me with listing my name on cheats-and-liars.com
if I would dispute the charge with the credit card company. Turns out that
cheats-and-liars.com and boomdrs.com are both registered with the same
registrar and both in violation of domain name registration rules using
blatantly bogus contact information."
http://www.macupdate.com/reviews.php?id=23637

"I believe the people at Boomdrs are dishonest, I have been writing to them
for 4 weeks now, asking them for the license no. but get no reply. (see this
link, which I know they'll erase when they discover this revue:

http://www.boomdrs.com/community/boomerang-product-bought-but-now-license-is
-deactivated-t151.0.html
I have also tried telephoning them many times but I think the number they
give is bogus."
http://www.macupdate.com/reviews.php?id=23637

Finally this quote is from their own website titled: "PayPal revisited
again..again..."
"If you can't wait, did not receive your activation number, and you really
want to muck things up, then file a dispute with PayPal. What we'll do:
We'll ignore any request for assistance you've made with us, ban your
account, and issue you a full refund." Adam Yates. company employee and
Administrator of Boomerang forum Forum.

http://www.boomdrs.com/community/paypal-revisited-again-again-again-t98.0.ht
ml