Install appdata into /usr/share/metainfo/ directory
Install appdata into /usr/share/metainfo/ directory

/usr/share/appdata/ is the legacy path. See: https://www.freedesktop.org/software/appstream/docs/chap-Metadata.html#spec-component-location
PintaProject/Pinta,PintaProject/Pinta,PintaProject/Pinta