Last Free Version is still available, I did have some problems with
site not available/Adress errors but persevered, downloaded today.
Works ok on Anti with ICE WM, Installed with G Debi which created
a menu item.
Only caveat is do not follow the new version available hints unless
you want or need to buy the Pro version 5x which is more limited and
adds watermarks. Buying Version 5 too expensive for the few times I
would need it as a private person.
Of course for daily use only fair to buy and the price seems fair for
the functions offered..
Download links are: http://code-industry.net/public/master-pdf-editor-4.3.89_qt5.amd64.deb