See also Tcl console.
Many properties of the application can be set from the file ~/.tkviewrunrc.
Start the Tcl console and type the following commands:
set orig [open $::VIEWRUN_HOME/tkviewrunrc r]
set new [open [HOME]/.tkviewrunrc w]
puts $new [read $orig]
close $new
close $orig
puts "\nModify [HOME]/.tkviewrunrc with your editor and restart reflred."