Newbie help

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I received a hard drive from a PCDVR system who's OS drive is dead, I have in tow the drive where the video files were stored. In the main partition is a folder IMAGEDB with lots of idx and db files. Through some google magic I was able to track down a link to a PDF http://www.cctvservices.net/software/DVR-Manual.pdf which mentioned these types of files and it mentioned software called BackupViewer. I was able to track down the software and play back the files. The software even has an export function. The problem I'm having is that the video exports without a watermark and the system-based on my observations- was set up to only record motion. I'm trying to figure out if the full CMS software for this product would be able to export the video with the included watermarks and avoid having to use desktop recording software to get my captures. This was in the details for one of the binary files of the backupviewer application . If you kind gentle persons could point me in the right direction, it would be much appreciated.