The Pozzo family remain committed to Watford after missing out on Premier League promotion on Sunday.
"We are here for the long-term," he told Udinese Channel. "There is no expiry date on this project.
"After losing in extra-time in the most decisive game of the season, of course the overriding emotion is bitterness.
"But we remain proud of the work done by [Coach Gianfranco] Zola and his boys.
"This defeat is not the end - we will start again next season.
"We have to congratulate Crystal Palace - they deserved to win."