remove the torx screw, then i use a hair dryer to warm and slightly soften the plastics (my house is very cold).
small flat screwdriver carefully between the clear plastic part of the lid hinge / vac body bit and prize apart whilst pulling the lid away.
The peg bit on the lid hinge has a chamfer on it to ease refitting.
first time i did one i thought it would break so using a bit of heat enables the plastic to be a little more flexible