Hi,
Can you open a new thread and mention accuratly the errors you get ( pasting the actual errors in the post), otherwise it's going to be tricky to help you effectivly.
PlayMaker dll version will remain 1.7.7f6 even if it's 1.7.8, that's unfortunate, but a constraint on the current release, hopefully the next one will be able to have its version updated properly. So simple make sure you install from the Asset store and you are good to go.
Bye,
Jean