Started with using sudo apt-get install wsjtx.? That got me V1.7 if memory is correct.? Then used sudo apt-get upgrade wsjtx and that got me to v2.0.
Used KM4ACK's update-pab script to update WSJTX only to latest version.? Didn't work for me.
Have been doing some checking, comparing WSJTX v2.1.0 which works on one card, but having lots of problems with my main card.? Was initially able to get V2.0.0 working as noted above, then all problems started when trying to upgrade to latest v2.1.2.
Finding lots of files on non WSJTX card that don't exist on the working 2.1.0.? Though the main difference is that on the working V2.1.0 card, there is a /usr/bin/wsjtx executable file, 6.6 MiB in size, dated 07/13/2019.? No such executable file can be found on the non-working card.??
Some files are on the working v2.1.0 card that are not on the non-working card.
Attaching PDF of files found on the 2 cards related to WSJTX.? Tomorrow will try purging any and all WSJTX files and folders from non-working card, then try loading it again.