Manager Graham Turner told BBC Radio Shropshire: "I'm quite happy to go into the season with what we've got.
"In terms of the first-team squad, we've got a nice balance of positional players, young players and more experienced players."
Regan began his career with Everton but left for Barnsley after failing to break into the first team.
After two years with the Tykes, he moved on to Hull City, Chester City, Macclesfield Town and then in January 2008 MK Dons, rejoining ex-Macclesfield manager Paul Ince, as well as several former Silkmen players.
He made nearly 50 appearances with the Dons before signing a two-year deal with Bristol Rovers in 2009.
"That's it," added Turner. "It's 10 out and six in and I'm responsible for all of them.
"I've kept those signed by the previous management that I like and the new ones I've brought in are all mine."
"I'm hoping that, with my squad, we can have a good season."
Source: BBC Sport
Source: BBC Sport