Screen freezes – Navionics® Boating Review

Had this app for a few years and always pay for the subscription. Up until now this has been a valuable piece of kit. However recently the app freezes up constantly and is inoperable. Also it will no longer sync with my Simrad NSS Evo 3 so won’t upload waypoints, tracks etc. what happened?
Review by Pauliewallie12 on Navionics® Boating.