• Download patched 2.50 firmware version from:

https://www.eevblog.com/forum/testgear/dsox2000-and-3000-series-licence-have-anyone-tried-to-hack-that-scope/msg2945740/#msg2945740

• Download license patched file from:

https://www.eevblog.com/forum/testgear/dsox2000-and-3000-series-licence-have-anyone-tried-to-hack-that-scope/msg1189010/#msg1189010

• Extract this file, edit infiniivision.lnk with:

80#infiniivisionLauncher.exe -l DIS -l MSO --perf -l BW20 -l SCPIPS -l CABLE -l VID

• Copy firmware file (.ksx) to USB drive. If your current firmware is older than 2.41 then rename this file to .cab
• Copy licence file (2x .cab files and .lnk file) to same USB drive
• Go to scope, turn on and plug USB to front panel.
• Press [Utility] > File Explorer, select the firmware file (3000XSeries.02.50.2019022736_patched.cab); then, press Load File, wait for scope to load and reboot.
• Check firmware has updated to v2.5, if successful continue
• Press [Utility] > File Explorer, select v241_link_install.cab file; then, press Load File, wait for scope to load and reboot.

Easy general instructions

https://www.eevblog.com/forum/testgear/dsox2000-and-3000-series-licence-have-anyone-tried-to-hack-that-scope/msg2364363/#msg2364363

How to patch firmware with IDA

https://www.eevblog.com/forum/testgear/dsox2000-and-3000-series-licence-have-anyone-tried-to-hack-that-scope/msg1453285/?topicseen#msg1453285