It should download x64 version if you're on win64. Are you sure you're not on an older choosenim? This is the PR that introduced this feature: <https://github.com/dom96/choosenim/pull/168>
- choosenim x64 ingo
- choosenim x64 dom96
- choosenim x64 ingo
- choosenim x64 ingo
- choosenim x64 dom96
- choosenim x64 moigagoo
- choosenim x64 ingo
- choosenim x64 dom96
- choosenim x64 ingo
