So I remember how to find an Appx application by (partial) name

Start-Application.ps1

function Start-Application {
    param($Name)
    if (!($Command = @(Get-Command $Name -CommandType Application -ErrorAction Ignore)[0])) {
        $Command = foreach ($Package in Get-AppxPackage *$Name*) {
            ($Package | Get-AppxPackageManifest).Package.Applications.Application.Executable | % {
                Join-Path -Path $Package.InstallLocation -ChildPath $_
            } | Get-Command
        }
    }
    & $Command
}