To find the correct software, select your scanner and operating system. Certain software IS NOT available for download. In this case, a CD-ROM may be purchased.
Looks like the 610 is not listed in the downloads, so you need to contact them to get the CD or there is a blurb from another site you can try to use with this "From Umax download page, I learned that Windows XP supports Astra 610p with its own WIA driver. So to install the WIA driver open the Windows XP controll panel “Scanners and Cameras.
Select the command “Add” and as Manufacturer select “Umax Data Systems”.
Follow onscreen step-by-step instructions to complete the installation for Astra 610P scanner."