I have immediately released a fixed version of the app (previous post) but without public announcement, to make sure further instabilities didn't ensue in the next few days. Everything seems stable so here you can find the updated APK files:
sportablet apk << click to download from google drive
uploader for garmin apk << click to download from google drive
Once downloaded, you'll have to install the app from the file manager (if you've never installed an app given the APK, there are many tutorials, like this: https://www.wikihow.tech/Install-APK-Files-on-Android). The APKs are signed with my developer key just like the ones from google play, so they will install over the old version just fine.
As I have anticipated in previous posts, I won't be able to push new versions to google play for the time being, so publishing the APK here will be the standard procedure from now on.
(The rather simple reason is that Google now requires all the updates to target android 9, and for an hardware-dependent app like mine that's a lot of work, especially in testing, with no real value for the end user. The app has been earning pretty much nothing for the last few years, so it's hard to justify all that work).