Their website seems not to be working. Not their fault. But here's some info if you want to call them.
BTW, I had only FANTASTIC customer service from them.
Below is the contact for the website registrant but I'm sure you can call and talk to someone from Aristogrid from that number
Administrative Contact, Technical Contact:
Cordero, Jose
jose.cordero@VOLTARC.COM
Voltarc Technologies
400 Captain Neville DR
Waterbury, CT 06606
US
(203) 575-3498 fax: (203) 578-4380