Doesn’t help much but I just upgraded to 2.5 and my SDS200 is detected. Try unplugging the USB cable and plug it back in on both the PC and the scanner.
I assume you are selecting E not . when the scanner boots.
Could be a faulty USB cable that decided to open circuit at the same time as the upgrade.
Do you know the drive letter assigned to the scanner?
If not, in the read data window click the drivetest button. This generates a text file, please save it and email me a copy arcsoftware at yahoo dot com
I'm having same problem as Colorado - post #1, I'm using older desktop computer Win 7.
Butel ARC536 PRO, worked fine until upgrade I did yesterday, visual control seems to function but not able to down/upload. Detect Scanner just does not work. Downloaded new version, 3 different times did install and even did repair function, still no go.
Pulled out old laptop using version 2.1, connected the same cable, everything worked perfectly?
Desktop still not working.
Open for suggestions.