changing handle upvc window

[klunk]

Hi
so I was asked get a window open they had no key to.
I drilled the keyhole out and snapped the lock on the handle I was going to put a new handle on but I have taken the 2 screws out and its not budging am I missing something

 

[crank39]

Probably corroded into the mechanism, can happen sometimes especially in bathrooms

 

[klunk]

It's a bedroom so just force it out ?

 

[crank39]

Give it some gentle hammer blows if needed