When I do "Edit -> Copy as Text -> Paste it text editor" in the spectrum view.
First column (of pasted data) is frequency[kHz], but 2nd column is voltage[mV] not [dBu].
And this 2nd column is the same of 2nd column values in the scope view.
This problem also occurs in Files -> Save Current Waveform as -> save as *.txt or *.csv format.
This problem is reproduced after I deleted "~\Local Settings\Application Data\Pico Technology" and reinstalled PicoScope. Latest beta 6.2.1 also causes this problem.