pwsh.exe hardcoded in 6 places - CLI completely unusable on Windows 11 with only PowerShell 5.1 (closed #411 is still broken in v0.0.417)

pwsh.exe hardcoded in 6 places - CLI completely unusable on Windows 11 with only PowerShell 5.1 (closed #411 is still broken in v0.0.417) #1297