Well, how about that...
Portable version on a desktop... That had not crossed my mind, even though I do have a number of portable apps on a small USB SSD I take with me when I'm away.
Installed a portable version of Calibre 3.48 on the desktop computer. Joy! now have a suitable Ebook viewer available.
The only thing K... needs to do now it return the old style (aesthetically superior) viewer to the 4.nn version then I'll be totally happy.
But I guess that ain't gonna happen.
Ax
Nb: Thanks to all who offered thoughts... Appreciated.
Footnote:
FWIW. I'm not the only one here (Home) who is lost as to why such a downgrade of the Ebook viewer was even considered...
SWMBO was most annoyed (I'm being polite) when her Calibre 3.nn updated to 4.nn before we were aware of the change.
Ax