Your Jump Desktop account supports 2 factor authentication which you can turn on in your Jump Desktop dashboard: https://app.jumpdesktop.com - Click the Security section here.
When enabling 2 Factor Authentication please make sure you save your backup codes. For non-Jump Desktop for Teams accounts there is no way for us to reset your account if you loose your 2FA device.
If you saved your back up codes, please use that to log in and reset your MFA by clicking "I have a backup code" when signing in. You can then get into your account, remove and then re-add 2FA.
If you are a Teams customer, another administrator from your team can reset your account MFA: Ask your Team administrator to sign in into your Team’s dashboard: https://app.jumpdesktop.com -> click your Team -> Users -> select the relevant user name here. In the ‘2 Step Verification’ section click the trash icon to reset your 2FA. You can then sign into your account and reinitialize your 2FA.