Options, account and your data

How the app looks, your subscription, updates, where your campaigns are kept and how to back them up, and connecting GM Companion to an AI app like Claude Desktop.

Appearance

Options › Appearance. Every change applies the moment you click it:

• Theme: follow Windows, light or dark.
• Accent color: amber, crimson, emerald, sapphire or violet.
• Heading and text fonts, including Atkinson Hyperlegible (made for low vision) and OpenDyslexic.
• Interface size, from 80% to 140%. Bigger helps when the laptop sits at arm's length behind your GM screen.
• Reduce motion turns off animations, including the 3D dice.

Your account and subscription

Options › Account shows who's signed in, your subscription, and how long the app can work offline.

• Manage subscription opens a secure page in your browser to change your card, see receipts or cancel.
• Check again checks your subscription right away, for example just after you've renewed.
• Sign out. Your campaigns stay on this computer.

The app checks your subscription when it starts and every few hours. After a check, it keeps working for 14 days without internet, so a game in a cabin is fine.

Updates

GM Companion updates itself. New versions download in the background and install when you close the app. When one is ready, a notice offers Restart now; it never interrupts a game. Options shows your version and has Check now.

Where your campaigns are kept

Each campaign is a single file on your computer, normally in %APPDATA%\GM Companion\campaigns. Its portraits, pictures and maps are inside it. We never receive your campaigns.

Back up a campaign

• Copy its .db file somewhere safe, like a USB key or a cloud folder. That's the whole campaign.
• Or export a GM copy as a web page or PDF, which you can read anywhere.

Keep campaigns somewhere else

1. Open Options › Advanced
   Under “Where campaigns are saved”, click Change…
2. Pick a folder
   Another drive, a backup folder, or a folder OneDrive or Dropbox syncs.
3. Choose how
   Move my campaigns there copies them, checks every copy, then moves the old files to the Recycle Bin. Use the campaigns there instead switches to campaigns already in that folder, like ones synced from another computer.

AI apps (Claude Desktop and others)

GM Companion can connect to Claude Desktop, Claude Code, or any app that supports MCP, so you can ask about your campaign in a chat: “what did we learn about the Ashen Hand last session?”, “give Thorvin a rival at the docks”, “write three rumors about the murder and add them as notes”.

1. Quit Claude Desktop
   So it doesn't overwrite the change when it closes.
2. Open Options › Advanced, under AI apps
   Click the button to connect Claude Desktop. For other apps, the same place has the command or settings to copy.
3. Open Claude Desktop again
   GM Companion is listed in a chat under + then Connectors.