Just to let you know that HashEngineering has contacted me.
We investigated using the block explorer; somehow it seems the funds were not imported in the app correctly. Still are assigned to the paper wallet. Probably user mistake.
Thanks for the prompt response and great support.
You are correct. The funds are moved to the 'software' address. However the software lost 'connection' to this address and seems to have generated a new address (with zero balance). How to retrieve address with the balance?
On the android mobile app for Dash Wallet (hashengineeringsolutions); I've successfully imported from paper an x amount of 'dash'.
Unfortunately, before I could create a backup, upon re-opening the app, the funds were gone. It seems that the app generated a new private key and somehow lost...