How to replace your "old" RLSimApp...

Downloading RLSimApp from the Google Play Store, always select the newest published version and/or upgrade.

A phone or tablet where the demo RLSimApp was previously installed may show an “old” unpublished version and the current published version or it may show a single app with an update pending. 

On a phone or tablet where RLSimApp has never been installed, you will see a single app option to install.