Fingbox Reset

I obtained a second hand Fingbox v1 and it I can't seem to be able to add it to my Fing account. After reading through the community here, probably because it might still be associated with the original account. I tried to do the reset with the reset button as described here in the community, but in my case the reset button seems to be broken or missing (the paperclip goes all the way in without pressing anything).

Can someone please help me reset the Fingbox so I can use it? I can provide its MAC / SN of the Fingbox if needed.
Thanks a lot.