A wiki kept in iCloud reopens after an update. If your MojoPad document lives in iCloud Drive — the Desktop & Documents folders sync there by default — a Mac that hadn’t opened it in a while can hold the file as a not-yet-downloaded placeholder to save space. After updating, MojoPad would then land on the launcher instead of reopening it, as though the wiki were gone. It never was: your notes are safe, on disk and in iCloud. MojoPad now recognizes a document iCloud hasn’t downloaded yet and opens it — which prompts macOS to pull it back — so your wiki comes back on its own.
Mark