Verschachtelte IF Abfrage Powershell

Split-Path $MyInvocation.MyCommand.Path -Qualifier

[System.IO.Path]::GetPathRoot($MyInvocation.MyCommand.Path)

Split-Path $PSCommandPath -Qualifier

Function Get-IniContent {       
    [CmdletBinding()]  
    Param(  
        [ValidateNotNullOrEmpty()]  
        [ValidateScript({(Test-Path $_) -and ((Get-Item $_).Extension -eq ".ini")})]    
        [Parameter(ValueFromPipeline=$True,Mandatory=$True)]  
        [string]$FilePath  
    )  
      
    Begin  
        {Write-Verbose "$($MyInvocation.MyCommand.Name):: Function started"}    
          
    Process  
    {  
        Write-Verbose "$($MyInvocation.MyCommand.Name):: Processing file: $Filepath"    
              
        $ini = @{}  
        switch -regex -file $FilePath  
        {  
            "^\[(.+)\]$" # Section    
            {  
                $section = $matches[1]  
                $ini[$section] = @{}  
                $CommentCount = 0  
            }  
            "^(;.*)$" # Comment    
            {  
                if (!($section))  
                {  
                    $section = "No-Section"    
                    $ini[$section] = @{}  
                }  
                $value = $matches[1]  
                $CommentCount = $CommentCount + 1  
                $name = "Comment" + $CommentCount    
                $ini[$section][$name] = $value  
            }   
            "(.+?)\s*=\s*(.*)" # Key    
            {  
                if (!($section))  
                {  
                    $section = "No-Section"    
                    $ini[$section] = @{}  
                }  
                $name,$value = $matches[1..2]  
                $ini[$section][$name] = $value  
            }  
        }  
        Write-Verbose "$($MyInvocation.MyCommand.Name):: Finished Processing file: $FilePath"    
        Return $ini  
    }  
          
    End  
        {Write-Verbose "$($MyInvocation.MyCommand.Name):: Function ended"}    
} 

$ini = Get-IniContent 'C:\temp\demo.ini'  
$usbdrive = Split-Path $MyInvocation.MyCommand.Path -Qualifier

$mapping = @{
'4.5.0' = "$usbdrive\update-v4.5.0-v4.5.3.exe"  
'4.5.3' = "$usbdrive\update-v4.5.3-v4.6.2.exe"  
'4.6.2' = "$usbdrive\update-v4.6.2-v4.6.3.exe"  
}

$version_start = $null

$mapping.GetEnumerator() | sort Name | select -Expand Name | %{
    if($_ -eq $ini.Version.version){$version_start = $true}
    if ($version_start){
        Write-Host "Updating version '$_' ..."  
        $result = start-process -FilePath $mapping[$_] -wait -passthru
        write-host "Installation wurde mit Code $($result.ExitCode) beendet.`n$('-'*30)"  
    }
}