This has the latest developments, but is also seemingly unmaintained for over a year: https://github.com/4lex4/scantailor-advanced

Scan Tailor forum: https://forum.diybookscanner.org/viewforum.php?f=21

> [ScanTailor Advanced] seemingly unmaintained for over a year

ScanTailor official repo also archived on November 29, 2020.[0]

> This project is no longer maintained, and has not been maintained for a while.

As alternative to ScanTailor (and its forks) there is gImageReader (Tesseract Qt/GTK GUI), but also seems like unmaintained since 2019.[1,2]

[0] https://github.com/scantailor/scantailor/commit/e881b30b6ed1...

[1] https://github.com/manisandro/gImageReader

[2] https://github.com/probonopd/gImageReader/releases/tag/conti...