Friends anyone know to say or if they have backed up the version of dude 3.6 to version 6? if they did, did they succeed? I followed a manual provided by the mikrotik wiki but it does not work, which leads me to believe that the format of the tables or backup file changed in the new version, if anyone has a feedback let me know, please

I did upgrade from dude 4.0 beta 3 to version 6.3something.
Try upgrading your DB first to 4.0.