Open your DAW and rescan plug-ins if Planes does not show up.
Activate: insert Planes, open the three-dot menu and choose Activate license…. Press LOAD .LIC… and pick the licence file you downloaded from your Perxal account, or PASTE to paste its text. One activation unlocks every instance on this Mac; no internet needed.
Not bought yet? The same card has a BUY LICENSE button, and COPY ID gives you the identifier to paste in your account at perxal.com. Until then Planes works in full, but its output is periodically silenced.
Manuals and README (English and Spanish):
/Library/Application Support/Perxal/Planes
The PDF is the whole method in six pages; Manual/en/index.html
is the browsable reference, with a sidebar and a search box.
Help: support@perxal.com