Running MacOS? Having trouble opening your Snapp! app? Try this.
First convert and download your Snap! project into a Snapp! app.
Open the zip folder an launch the Snapp! application. It should show this message.
Do not press "Move to bin"
Instead: Go to system preferences and press "security and privacy". At the bottom you should see; "Your app was block from use because it is not from an identified developer"
Press open anyway.
Now open the app, it may ask the same question, press open.
And there you go!