As a great fan of linuxmint , i jumped on the LM19 train quick.....
I did a fresh install of LM19 on my main HAM pc, and after all the normal stuff I usually install, I installed CQRlog.
I used the install instructions on this site, adding the repository, updating and then installing CQRlog.
And i am happy to report that at least the basic functions seem to work out of the box :)
(will test some more, but i do not see anything going wrong, most software versions used, are the same as in LM18.3)