Hello,
I still have 2.2.2 , 2.3 , 2.3.1 , 3.0 and 3.1 (plus 3.2 but you seem to dislike it

)
Which one do you prefer ?
[Edit] As I will not be able to look at the forum for some days, here is a link to get 2.3.1 and 3.1 versions. 3.1 is the last I uploaded to my Max2 and it properly works.
Select one, put it at the root of your Max2, rename it update.upx and go for a manual upgrade !
https://transfert.free.fr/tL4omIr
valid 30days