Another possibility is Chondromalacia patella in which the knee
cap keeps rubbing against the underlying cartilage of femur (corrected by braces
, taping, non-steroidal anti-inflammatory, physiotherapy or surgery). This is a likely causein your case, though a meniscal injury is also a possibility given the past history of meniscoplasty. Having said this, at times the noise has no pathology behind it. This needs an evaluation by either an orthopedics specialist or by a sports injury specialist.