For Banana Accounting 9 you can recover your license key through an online form: License Key Recovery, by entering your registered user email.
For Banana Accounting Plus no license key is necessary, as the subscription is based on the user's email. If you changed your email or in case of problems with the email please contact us.
For Banana Accounting 8 and earlier versions, in case of loss of the license key you can contact our paid support service (see price list). However, we suggest that you want to consider upgrading to Banana Accounting Plus, which can also be done without the license key of the old version. The cost is very similar but you will have all the advantages of the new version.
With the update you also get a free month: