Howard leads Victoria Road Football LLC with Peter Freund, now the Daggers' executive chairman, and Craig Unger.
Both own sport franchises and the group founded United Soccer League club Memphis 901 earlier this year.
USA international Howard now plays for Major League Soccer side Colorado Rapids.
Paul Gwinn, who will remain Dagenham chairman, said: "We hope that, with our finances stabilised and a promising young side under the vastly experienced Peter Taylor, the prospect for the club and its supporters is a bright one.
"I would also like to take this opportunity to thank everyone who donated, time or money, to the club over the past months, which was essential to put us in the position we are today.
"As the saying goes, from adversity often comes strength."