Powershell Scipt Runs in ISE only - powershell

Question

I have researched this question quite a bit and have found others with similar issues, but no fix that works for us.
We have built a power shell script to monitor a folder for new images, check their color profile with exiftool and convert when needed with image magick. All of this functionality works well enough when the script is run in ISE, but will not work if the script is executed from a .exe or ran manually.
I have read that FileSystemWatcher requires the script be ran in STA which I have attempted to do a few times by including -STA in the target for the .exe shortcut. Doing so proves unsuccessful.
#----------------------------------------------------------------------------
Unregister-Event -SourceIdentifier FileCreated
Clear
#----------------------------------------------------------------------------
$description = Get-WmiObject -Class Win32_OperatingSystem |Select Description
$description = $description -Replace "#{Description=",""
$description = $description -Replace "}",""
$assetsFolder = "E:\" + $description + "\Capture One Session\Output"
$conversionStage = "C:\Profile_Pro\conversionStage"
#----------------------------------------------------------------------------
New-Item -ItemType directory -Force -Path "$assetsFolder" | Out-Null
New-Item -ItemType directory -Force -Path "$assetsFolder" | Out-Null
#----------------------------------------------------------------------------
$filter = "*.*"
$srgb = "sRGB IEC61966-2.1"
$isTif = "tif"
#----------------------------------------------------------------------------
$monitor = New-Object IO.FileSystemWatcher $assetsFolder, $filter -Property #{
IncludeSubdirectories = $true
NotifyFilter = [IO.NotifyFilters]'FileName, LastWrite'
}
#----------------------------------------------------------------------------
$onCreated = Register-ObjectEvent $monitor Created -SourceIdentifier FileCreated -Action {
#----------------------------------------------------------------------------
Add-Type -AssemblyName System.Windows.Forms
#----------------------------------------------------------------------------
$path = $event.SourceEventArgs.FullPath
$name = $event.SourceEventArgs.Name
Write-Host $path
Write-Host $name
If ($name -Match $isTif)
{
$BOX = [System.Windows.Forms.MessageBox]::Show('TIFF FILE DETECTED. PLEASE CHECK RECIPE.', 'Warning', 'ok', 'Warning')
$path = $path -Replace ".tif.tmp",".tif"
Start-Sleep -s 2
Remove-Item "$path" -Force
}
Else
{
$colorSpace = C:\Profile_Pro\tools\exiftool.exe -T -ProfileDescription $path
$profileConvert = 'C:\Profile_Pro\tools\sRGB_Color_Space_Profile.icm'
If ($colorSpace -Match $srgb)
{
}
Else
{
Start-Sleep -s 3
$name = $name -Replace ".jpg.tmp",".jpg"
$path = $path -Replace ".jpg.tmp",".jpg"
Move-Item -Path $path -Destination $conversionStage -Force
convert $conversionStage\$name -profile $profileConvert $path
Start-Sleep -s 1
Remove-Item "$conversionStage\$name" -Force
#----------------------------------------------------------------------------
$BOX = [System.Windows.Forms.MessageBox]::Show('COLOR PROFILE ERROR. PLEASE CHECK RECIPE.', 'Warning', 'ok', 'Warning')
#----------------------------------------------------------------------------
$TO = $env:USERNAME + "#biz.com"
$Outlook = New-Object -ComObject Outlook.Application
$Mail = $Outlook.CreateItem(0)
$Mail.To = $TO
$Mail.Subject = "COLOR PROFILE DEFECT: " + $name
$Mail.importance = 2
$Mail.Body = "A COLOR PROFILE DEFECT HAS BEEN DETECTED WITH FILE:`r`n`r`n$name`r`n`r`nTHIS FILE IS FIXED.`r`n`r`nPLEASE CHECK YOUR PROCESS RECIPE."
$Mail.Send()
}
}
}
#----------------------------------------------------------------------------
#Unregister-Event -SourceIdentifier FileCreated
#----------------------------------------------------------------------------
Any ideas to keep this script running as a .exe or outside of ISE would be greatly appreciated.