This program is free. It is easy to say that you get what you pay for. Some of its pairings are suspect and you must examine the settings carefully. It has been known to give the bye to the leading player because it was set for random bye.
Probably OK for club and junior events but I wouldn’t recommend it for a ‘proper’ tournament. (AMcF)
Since that review was written Sevilla may have been improved and is looking for FIDE acceptance. (AMcF)