You can restore your Importacular templates from either a file or the cloud backup (this option was added in version 4.4).
To access your backed up templates, go to the Manage Templates area of Importacular. Then select 'Restore.'
You can then select to restore from File or from the Cloud.
From File - If you have saved a File version of your template for a back up, you can select the File option and load it in.
From Cloud - Each day Importacular is opened a backup of the templates will be made. One will be retained each day and then two a week for up to (currently) one month. When using this option, you should select the date on which you would like to restore your templates to (often this would be the last date you opened Importacular).