Sorry for the late reply - our rebranded/replacement wallet for eos-voter (called Anchor) should resolve this issue. I think what happened is the USB connection library in eos-voter is out of date and all of our effort has gone into Anchor, which is now causing the older versions of eos-voter to not connect.
The latest version is 1.0.0-RC6 and can be found on our github page:
https://github.com/greymass/eos-voter/releases/tag/v1.0.0-rc6
It's a brand new interface with some familiar features. If you need more support, feel free to join us in our telegram channel: https://t.me/greymass
RE: Converting an EOS account to use a Ledger with eos-voter 0.6.x (Greymass Wallet)