Hello all, here are some more detailed instructions for the flatpak (
https://drive.google.com/open?id=1o1Xi1W5T8jXh7tB66GtQuoYVx-7Cjius) for systems on which I have tested them.
Arch Linux:sudo pacman -S flatpak
flatpak remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
reboot, then
sudo flatpak install slimcoin-qt.flatpak
Ubuntu 16.04:sudo add-apt-repository ppa:alexlarsson/flatpak
sudo apt update
sudo apt install flatpak
flatpak remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
reboot, then (note the absence of sudo on this version)
flatpak install slimcoin-qt.flatpak
Ubuntu 18.04 and 19.10:sudo apt install flatpak
flatpak remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
reboot, then
sudo flatpak install slimcoin-qt.flatpak
If you have any issues, please let me know.