The Prestonpans professional, who will return to the European Tour next season, finished 10th in the third-tier circuit's Grand Final at Barbaroux which was enough to clinch the rankings crown as well as an invitation to the lucrative French showpiece.
Russell, 38, had been sitting in a share of second with a round to play and boosted his title bid with a two-under outward half which was highlighted by a hole-in-one at the short eighth.
But the former Cannes Open champion spilled four shots coming home in a two-over 74 for a four-under 212 and finished four strokes behind Victor Dubuisson.
A former Amateur champion, Dubuisson beat Edouard Dubois in a play-off after both players had tied on 208.
Gavin Dear birdied his last three holes in a battling 71 to finish alongside Russell on the 212 mark.
Like Russell, Dear has enjoyed an excellent season, his performances on the Alps Tour earning the Murrayshall man a step up to the Challenge Tour next year.