Yes the wallet has a backup seed, and looks like I have version 3.0.1 (288). I didn't realize there was a desktop version, can I just install that and access my wallet through the backup seed?
I think there's a desktop version, unless it's just for mobile.
If not, get
electrum and follow these instructions:
1. Open the electrum you just downloaded/installed
2. Select "Standard Wallet"
3. "I already have a seed"
4. Paste in the seed in the box, click "options" and tick bip39 seed.
5. Paste in the next window m/0' and hit next.
Then follow the steps (adding a name and a password) and your wallet should be created with everything.
(actually this might not work - some poeple online seem to say that's the derivation path, others say they use their own thing).
You can import the master private key if you can find it (but take both devices offline) while importing! That'll start with xprv.