@sky0000 This is the advice that Suunto support chat gave, perhaps this will work for you. Good luck.
Please try these steps:
Plug in the watch to the PC and open Suuntolink
When the watch is recognized, press the gear icon on top right.
Go to watches.
You will find the watch name there.
Click many times on the name (5 should be enough, but keep pressing until a checkbox appears)
A checkbox will appear. It will say to “Put the watch to deep sleep after reset”.
Check the checkbox, and then click on “reset all settings” above it.
Follow the instructions.
Let the watch go to deep sleep.
Unplug the watch and then plug it in again: if this worked, it should start again from the original boot and it should then work normally.