sorry I completely missed your response. The second page just eats them sometimes...
Parameter lock is live recording of parameters into a sequencer. For example turning up and down an FX parameter gets recorded into the sequencer and the sequencer plays back that knob movement as if it was programmed in. It would allow for much more variation and possibilities.
If you are still not satisfied with this response, this is what google said: "Parameter locks" means that the step sequencer can record and play back the parameter values you input with knobs.
How can you use a BP, HP or LP filter for only one output or operator? You can only set them for everything, not for one thing specifically. You know that would be kinda neat too. Having the ability to set FX for only a select few operators, meaning you could modulate a carrier with a ping-pong delay or something, or in this case, only allow specific parts of noise into another waveform
Edit: I just noticed that this parameter lock thing would go hand-in-hand with more modulation destinations since it's basically that but plugged into a sequencer. Thinking about it, we already have something like that with the two sequencer modulators, but two is just not enough to control like four different changes at once
Edit 2: I sadly need to inform you that the crash is still occurring. I don't know what I tested, but what I tested was bullshit. It still crashes when playing a note after pasting anything into operator 1. Weirdly enough, the name of the binary is 999d but in the PFM it still sais 999b