Re the connector: the small black bits at each end will depress, and release a notch in each side of the flexi. So depress one side and pull that end of the flexi outwards slightly, then do the other side and repeat till it's free. Don't like these as a few fittings and removals seems to damage the print that goes into the socket. Same with refitting except in reverse. I recently had to trim off the notches at each side of the flexi
to facilitate easier refitting.
Compatibility is a matter of luck - different widths, number of traces, attaching systems, etc. Bruce