For the last few days I have been using this latest beta version of WSPR software. It appears to work stably but I miss the real-time scrolling waterfall that was on WSPR-X, which I gather is no longer being developed. The version V4.0 r4171 I have is the best available, or so I am told.
At the moment I am trying this software on 12, 15 and 17m with the "strapped feeder" antenna via the ATU.
UPDATE 1632z: Have now gone back to 472kHz WSPR.
UPDATE 2150z: 29 unique stations spotted on 472kHz WSPR in last 2 weeks. I need to check the all time number, which is higher. Right across Europe! The 2 USA stations are band reporting errors and were NOT on 472kHz!