Hi
My other problem was with trying to run two Wherigo caches in the app. In both cases I viewed the cache listing, used the link in that to download the cartridge, loaded that in the app, got the initial message and clicked New Game, but then there was nothing visible - nothing in Locations, You See, Inventory or Tasks.
I was stood in the right place to start each one.
I was able to revert to downloading the cartridges separately and playing them in WhereYouGo on the same phone.
Best wishes
Barry