Quote:
Originally Posted by pazos
That happens if you're trying to update from a apk with different signature. For example: update from F-droid to a github/rocks apk, update from a debug to a release apk, update from self-signed apk to any other.
You can remove the apk without loosing any configuration as long as you do not remove the /sdcard/koreader folder, where shared preferences are stored.
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Ah; thanks!
I removed the old one and installed the new one; works great.
Thanks for the help!