The 48-year-old had been hired by Notts in March 2016 to try and arrest an alarming slide down the League Two table.
Cooper, who famously operated under an undisclosed points target while at Meadow Lane, managed to secure safety for the Magpies in the end.
However, he departed the club as the final whistle blew on their final game of the 2015-16 season, a 5-0 defeat to Carlisle United, and subsequently joined then-Conference side Forest Green Rovers.
With the Gloucestershire-based club now in the Football League and preparing to take on Notts this weekend, Cooper spoke of how he enjoyed his time in Nottingham, but had a dig at the previous chairman.
“I really enjoyed my time there, it’s a cracking club,” he told the FGR website.
“It’s the oldest club in the Football League, they are nice people there with a great stadium and when there’s a few fans in, they really get it rocking.
“I really enjoyed it but it’s just unfortunate that the chairman made it difficult at the time.”
Cooper also echoed Kevin Nolan's sentiments in claiming that FGR have everything to win and nothing to lose when they take on the division's top side.
He continued: “We’re going to a team that are top of the league, there’s going to be a massive crowd and have had a brilliant start under Kevin and they'll fancy themselves to continue that.
“They had a bit of a hiccup on Saturday in the derby but there's no pressure on us. Nobody expects us to go there and get anything. We are certainly going to go and have a go and try to play and see what happens.”
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