Which CM version supports win7

No. With Cryptomator 1.5.0 there is no more offical support for win7. See 1.5.0 Final issue with Windows 7 ESU and 8

That said, you can still try to install newer Crypotmator versions and see if they work. And additionally, you can see if someone from the community can answer your questions regarding Cryptomator+Win7.