Hacking the DSO2X1X

[Aldo22]

Should I follow the same instructions to convert to 2D15 like it was a xxCxx model?

You can do that, but I don't think you'll notice any benefit.

Should I update to the latest version? It came with SW 1.0.3.0.0 230327.00 and FW 3205.

You can do that. Read the FAQ.

I have a question about the probe. On x10 attenuation it mentions max input voltage<600V DC+Peak AC. Does it mean 1200 Vpp or 600 Vpp? 230V(rms) is 650Vpp. Can I probe that?

I think the limiting factor is the scope, not the probe.
Maximum Input Voltage: 300VRMS (10X)