Clutch slipping?

[Adam]

Just bought 2014 vx line 130bhp,man I bought it off updated it software to 160bhp everything was fine for a week until I noticed under full acceleration in 3,4,5,even 6 gear the revs would rise up by 2000 revs our it's like it's slipping,trying to bite and one time I clutched and no foot on accelerater the revs stayed at 2500rpm breifly the car only has 43000 miles and under normal driving everything is fine just wondering cause it's original 130bhp and now has 30bhp more is that the problem to much torque?