Hi,
I had the same Problem. Token worked for a long time, after some updates it stopped working.
Installing and uninstalling different version of the safenet client did not work.
I solved it by going the the Devicemanager in Windows
Windows detected the token as "USB-Token" in the devicemanager.
I clicked on "Change Driver" and Selected "Microsoft Usbccid smarcard reader (WUDF)"
With This Driver, the token worked fine again.
My token was an "eToken 5110 CC (940)" also named "Token JC"
I hope this helps someone
Carsten Jendro