New window crank arm?

Hello, my window that I need to crank open has stopped working. Hoping replacing the crank mechanism verse new window. The arms at the bottom say "Wright" and 2006. The actual crank handle says "semco". It keeps slipping when trying to crank, I've tightened the screw on handle but doesn't work still slips.
Help identifying replacement t part would be wonderful!

Thank you,
Kate