Just tried the hack on a DSOX3034A that I got last week. I think the build week is 43 of 2013 (late October-ish, there is a 1343 under the QR code on the serial #, MAC addr sticker on the back of the unit). The firmware version that came with it is 02.36.2013091301.
Unfortunately, I'm not having any luck getting it to boot from the USB stick with the hacked Core DLL file. I also tried to get it to boot without modifying any of the files except for the override .txt file, again with no luck.
The scope appears to read information from the USB drive (can see the led flashing). Next, all I get is it cycling through lighting up the channel buttons, intensity and wave gen, run stop and single and then ref, math, digital and serial. It goes through about 8 cycles and then reboots itself. No matter what I have tried, I have seen no change in behavior when trying to boot from the usb flash drive.
To verify that the scope can handle the formatting of the drive, I booted the scope without the usb flash drive plugged in. After the scope was up and operating normally, I plugged in the usb drive and was able to browse the directories via the Save/Recall button.
Not really asking for any one to figure this out, just trying to document another data point for a relatively new scope.
I'd be interested to know if anyone else with a newer scope that came with firmware > 2.35 is having any success with the hack.