It sounds like somehow the Sentinel-1 Toolbox has been removed or not installed.
Check if you can update it from the Tools/Plugins window.
If not, you may need to uninstall and reinstall SNAP making sure that S1TBX is included.
It sounds like somehow the Sentinel-1 Toolbox has been removed or not installed.
Check if you can update it from the Tools/Plugins window.
If not, you may need to uninstall and reinstall SNAP making sure that S1TBX is included.