From the CHANGE_LOG file:
v1.605,606,607 Jun 15, 2023
Added variable sample time to TDoA extension (15, 30, 45, 60 seconds).
Right-click menu: new option "show cursor frequency". State is saved in a browser cookie.
Show selected label database on frequency scale.
Shift-click on "Spec RF/AF" button toggles in reverse (same effect as alt-s key).
New "dx" URL parameter "open" that shows DX labels panel.
i.e. "dx=2" vs "dx=2,open". See DX labels panel help.
DX community label database changes:
Adopted EiBi label type classification / color scheme.
Standardized on three letter country codes (except UK), two letter USA state codes.
DX labels panel shows type category names, colors and counts. Same as is done for EiBi.
Spec button toggle direction now correct.
Increased size of waterfall cursor frequency text.