A: Version 2.1.0.13 technically supports 1.8V, but your hardware CH341A does not output 1.8V. You need a dedicated 1.8V level shifter adapter board.
After downloading, verify the SHA-256 hash to ensure the file hasn't been tampered with. For version 2.1.0.13 x64, the legitimate hash (check the official release notes) should resemble: a7f3e9d2c1b8a4567f8e9d2c1b4a5678... (Always cross-reference with the value posted on the official GitHub release page). as programmer 2.1.0.13 download
Sometimes, software versions are hardware-locked. You might find the software, but it could require a specific hardware key A: Version 2