I have a persistent problem installing/upgrading Database Browser. It is cancelled with this message (translated from German):
"The downloaded file Database Browser is invalid and cannot be installed. Maybe the cause is an uncomplete download or a network problem. Please start the upgrade once again."
There is no problem with any other Portable App. I have no idea, what network problem could be adressed.
Windows 10 pro, C:\Users\MW\PortableApps