For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:diamond_gr/openSUSE_Tumbleweed/home:diamond_gr.repo
zypper refresh
zypper install vamox-mate
For openSUSE Factory ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:diamond_gr/openSUSE_Factory_ARM/home:diamond_gr.repo
zypper refresh
zypper install vamox-mate
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:diamond_gr/15.4/home:diamond_gr.repo
zypper refresh
zypper install vamox-mate