Thursby Software today announced that they are offering users of DoubleTalk a US$99 upgrade to DAVE, the company’s cross-platform file and print sharing application. Users must fax or mail in proof of purchase for their DoubleTalk product and complete a form which is available on the Thursby Web site. “This will allow DoubleTalk users the ability to migrate to Mac OS X,” said Thursby president, George Colley. “And for those customers still on earlier versions of the Mac OS, DAVE will add the capability for the PC to see the files on the Macintosh.”