I just used the Check for updates and downloaded 5.0.2 After installing I start the app then it asks for my license key which I provides then this is what I receive :

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Sorry that you've run into problems! This can happen if the old Bootstrap Studio version is not uninstalled fully and the shortcut is starting it. The fix is relatively straightforward. You can read a solution here: https://bootstrapstudio.io/contact-us#faq

Indeed I had the old one installed. After uninstalling and replacing the old shortcut it works. Thank you !

I had the same on Ubuntu, but I solved by removing the following folder within your home folder


Then restart the Bootstrap Studio again and enter the license key. Now it could take a moment (or two) and then it should enter the application.