problems with registration key when updated on sketch 19

[bergwaran]

i have just updated sketchup , and i am using now sketchup 19...lightup worked perfectly on sketchup 18....when i want to install it now on 19 it says, that my registration key is not correct...i tried it several times...i looked up on the lightup site ..i updated light up too...do i have to uninstall it on my old version of sketchup ,that is still on my computer ?...if yes, how to do it....thank u very much for your help..

bergwaran