Hi masterpier,
Great that it's working for you on Tyson, and thanks for sharing your impressions on performance and KDE!
About the welcome screen script: it installs exactly the same package (soplos-vmware-modules) as doing it from the terminal, and it has worked fine for other users. Most likely your system just needed updating before using it. It's always a good idea to do that before installing anything from the welcome screen:
sudo apt update
sudo apt full-upgrade
If it fails again after updating, let us know what message it showed and we'll take a look.
Thanks for your feedback and for supporting the project.
Best regards,
The Soplos Linux Team