Velux window GGL M04 and blind

GGL M04 Velux window with slight water damage. 15 years old We had a leak in the flashing and the window frame got a bit rotten at the corner. We ended up replacing the window. Frame is all dried out now and solid. The window is functioning perfectly. Someone who knows what they're doing could repair it and save a lot of money on a new one. Where it was rotten could be repaired with wood filler. The discoloration could be sanded down, then a coat of lacquer. Also including a black, blackout blind from 'Blinds 2Go' The blind alone cost €70 €150 ono