Thank you!
With your 4th solution now it is working.
On Ubuntu Linux I'm struggling yet, same chmod command gonna work because I confirmed that file's executive permission is absent.
MacBook Pro 16-inch 2019
macOS Catalina (v10.15.5)
I have bought both classic version and recharged version of FPVFreerider.
Files ending in '.app' is not installed on my Mac. (Windows are perfectly working)
Strangely, Demo of Recharged version, ending in '.dmg' is perfectly installed just in 30 seconds.
I just downloaded the file and dragged the '.app' file to my Applications directory, but the icon didn't appear in Launchpad and prompted with "cannot open this application" when I double clicked the icon.
I accepted these apps in security and privacy, system settings.
Please give me an advice about installing these apps in macOS.