Not sure which Bolt model you have? Refer to this article.
At this time, older 1st generation Bolt Pro or 1st generation Bolt 2000 units should only be used with Bolt Manager version 3.1.5 and Bolt firmware package version 2.0.4, or the respective Bolt Utility release for those units, as described in this article.
DO NOT USE Bolt Manager or Bolt firmware packages after these specific versions!
In general, there is no need to update the firmware on 1st generation Bolt units as they have been discontinued for some time, and no new features have been added to these devices.
If you are trying to pair devices, you must use these specific releases of Bolt Manager / Bolt firmware.
These releases are found on the downloads page ( https://teradek.com/pages/downloads#bolt ) by clicking the Show Previous Versions button, and direct links to each one are provided below for convenience:
Bolt firmware package version 2.0.4:
Bolt Manager version 3.1.5 for Mac:
Bolt Manager version 3.1.5 for Windows: