Migrating your contacts from 123 form builder to Nimble is easy.
To start, go to the Results section and click on "Export to CSV (top right corner) to download the CSV file containing all form submissions.
In the light-box type your email address. Make sure that you are logged in the same browser with that email address. Click on Download CSV and you'll receive a download link with the CSV file in your Inbox.
Once you have the file, log into Nimble and click on your avatar in the top-right hand corner. Choose "Networks & Imports".
Use the CSV importer to start the process. For more information about this feature, please take a look at the following: Nimble Import Wizard