The 'forked' ends come with wiper arms only,
If they slide off the only way to keep them on the arms besides new arms is to degrease & slightly rough the area and reglue with clear weather resistance epoxy.
Over the years I have found that the gap for the wiper blade pin opens up, this can sometimes be resolved by gently warming the plastic & then sqeaze them together to the required tension, also some replacement wiper blades the pins are to small & the slot which the arm is inersted to wide which give a very poor fitting blade.
For me it's OE all the time