In WordRider 0.75, for a text file saved in Txrider mode, the display emulation type (Full screen, TI 89, TI92) is not saved in the file. Ie you must reinitialise it manualy every time you update a file.
The settings of the display emulation type is not a part of the text file.
You have to set a default emulation type in the options - Main menu->Edit->Options->Text Editor->Emulation for new opened file.