This is a beta release of WSPR (version 4.0). It has worked fine for me.
This is the version I currently use on all bands. Unfortunately, it does not have the real-time waterfall. You see the action only after a 2 minute TX period and not during the transmission as was the case for WSPRX.
The interface looks very similar to WSPR V2.2.
Please let me, and others, know if there are more recent releases by adding a comment and link.