Over on the JARDesign Forum, JARDesign developer, Evgeny Romanov has published an X-Plane 11.50 compatibility beta update for some of their products.

Ground Handling Deluxe and X-Life were completely reworked to be compatible with X-Plane 11.50. 

X-Life, is JarDesigns Traffic plugin giving you traffic for your whole airport, making your simulation more realistic.

For developers, if you want to use WED with the product, you have to save your old X-Plane 11.41 on your hard drive. This annoyance will hopefully be fixed later.

This is a beta release, so if something is bugged please post it at JARDesigns forum. The Link for Ground Handling Deluxe is here and for X-Life here. 

If you want to get one of the addons you can find Ground Handling Deluxe here for 16.99€ and X-Life for 23.80€ here.