(Re-)Importing Your Account on the Web
Once your words have been safely backed up, go to the Accounts page of the Nodle Cash web Wallet https://nodlecode.github.io/polkadot-js-apps/#/accounts
Go on the Web UI and click Add Account (If you are using the Polkadot.js extension on chrome, this will not work)
Give the account a name, then paste your 12 words under mnemonic seed. (Double-check the spelling is correct, and that there aren't any extra spaces). Finally create a password (We recommend using a long, randomly generated password stored in a password manager). Don't Click "Next" just yet!
Open the Advanced Options at the bottom, and select the Edwards curve. Nodle uses slightly different cryptographic scheme than the standard Polkadot.
Now Click Next, and Save.