[SOLVED] Install .txz file

[vatosflokos]

Hello,
I need to downgrade my version of Calibre to 4.23 to make use of the Drm plugin for some kindle books that I want to convert to pdf.
I have totally removed my previous version 5.5 of calibre and now on my desktop, I have a shiny, de-compressed folder of Calibre ver. 4.23.
The thing is that I can not find any installation notes, .make and ./configure commands are totally useless leaving with no option but to ask for your help
The package was downloaded from here https://download.calibre-ebook.com/4.23.0/ What steps should I follow so I can complete the installation?
I really REALLY thank you for this...
Eddie.

[Flemur]

The package was downloaded from here https://download.calibre-ebook.com/4.23.0/ What steps should I follow so I can complete the installation?

.txz is a slackware installer file - you can open it with an "archive manager" like file-roller to see the content (.deb files are similar).

Try installing calibre with a .deb file from here: https://pkgs.org/download/calibre
...although I don't see a 4,23 version for ubuntu or debian; Ubuntu versions go from 3.21 to 4.99 with nothing between.

Also try an internet search on "Calibre" "4.23" ".deb" you might find one ...