apk*
also I remember this happened with some of the first 0.8.0 betas but I reported it and you got it sorted quickly :)
Discussion
Try downloading the apk using .app instead of .com - we changed our domain during the v0.8 testing period
same issue still
Hard to say what else you can try.
Android doesn’t like when you install from different sources, if you installed from Google Play you’re often locked into only upgrading from them.