Here is how to unlock options of RTO1000. You will need 1 option already unlocked. We will transmute this into a "K0" super option that unlocks everything by patching the "GetOptionIndex" method on the license object so that when you go for 4GHz bandwidth and USB 3 decode madness the scope software drunkenly looks at your shitty I2C/SPI decoder option and says "that'll do!"
First, navigate to C:\Program Files\Rohde-Schwarz\RTx\3.70.1.0\RS.Compass and open RsCompassFramework.dll. Then, use your favorite hex editor to look for
1C 00 00 48 8B 03 83 B8 A4 00 00 00 07 74 0A 0F
B7 40 44 48 83 C4 30 5B C3 B8 FF FF 00 00 48 83
C4 30 5B C3 CC CC CC CC CC CC CC CC CC CC CC CC
and replace with
1C 00 00 48 8B 03 83 B8 A4 00 00 00 07 74 0B 0F
B7 40 44 83 F8 6A 74 09 EB 0C B8 FF FF 00 00 EB
05 B8 00 00 00 00 48 83 C4 30 5B C3 CC CC CC CC
This will transmute option 0x6A (RTO-K1 I2C/SPI) into option 0x00, the universal option.
"But I don't have RTO-K1," I hear you ask. No problem. Simply find the option index of the option that you do have by looking in C:\Program Data\Rohde-Schwarz\RTx\DeviceFootprint_blahblah.xml, searching for "optionIndex" and then converting the value to hex. Suppose you have RTO-K17 "HD mode," another common option. You will find optionIndex=117, 0x75 in hex, and then replace 0x6A with 0x75:
1C 00 00 48 8B 03 83 B8 A4 00 00 00 07 74 0B 0F
B7 40 44 83 F8 75 74 09 EB 0C B8 FF FF 00 00 EB
05 B8 00 00 00 00 48 83 C4 30 5B C3 CC CC CC CC
"But I don't have any options at all." Sorry, I truly am, but I can't help you. Maybe ask for demo options and see if you can unlock those?
"But I don't have RTO1000, I have a RTO2000 or RTO6." Sorry, I have seen the DLLs of the newer software (version 5 rather than version 3) and it looks like this accessor became inlined at some point so this technique no longer works. It might be recoverable through search/replace, but you'll have to chase that down yourself.
"But I don't trust your assembly" It's like 10 instructions, just paste that shit into an online x86 disassembler and convince yourself that it's a conditional "ret 0"
All other RTO1000 enjoyers: have fun!