I tried editing
i18n.msg_cli.txt firstly with an XOR with the value hex55 and that turns the file into plain text. I changed the
Empty\nSeat entry with an empty string and afterwards with blank spaces. On both times PokerStars failed to start and the log file had the error message
catch 'CommSSLVerify: verify failed' in AppModule::Start().
Seems like we can only change the gx.ini files.
But another way to get rid of the empty seat text is to change the
shield entry in the fonts. Change it to this
shield=null. But bear in mind that all text on empty seats won't show up, like Seat Open (Which might be want you want anyway).