This is how you add an option to switch to PS7 (and back to PS5) to the ISE Menu.
#1 Open PowerShell ISE
#2 Run: $PSVersionTable
Check PS Version
#3 Copy/Paste/Run
$ErrorActionPreference= 'silentlycontinue' $psISE.CurrentPowerShellTab.AddOnsMenu.Submenus.Clear() $psISE.CurrentPowerShellTab.AddOnsMenu.Submenus.Add("Switch to PowerShell 7", { function New-OutOfProcRunspace { param($ProcessId) $ConnInfo = New-Object -TypeName System.Management.Automation.Runspaces.NamedPipeConnectionInfo -ArgumentList @($ProcessId) $DefaultType = [System.Management.Automation.Runspaces.TypeTable]::LoadDefaultTypeFiles() $Runspace = [System.Management.Automation.Runspaces.RunspaceFactory]::CreateRunspace($ConnInfo, $Host, $Default) $Runspace.Open() $Runspace } $PowerShell = Start-Process PWSH -ArgumentList @("-NoExit") -PassThru -WindowStyle Hidden $Runspace = New-OutOfProcRunspace -ProcessId $PowerShell.Id $Host.PushRunspace($Runspace) }, "ALT+F5") | Out-Null $psISE.CurrentPowerShellTab.AddOnsMenu.Submenus.Add("Switch to PowerShell 5", { $Host.PopRunspace() $ChildProc = Get-CimInstance -ClassName win32_process | where {$_.ParentProcessId -eq $Pid} $ChildProc | ForEach-Object { Stop-Process -Id $_.ProcessId } }, "ALT+F6") | Out-Null
#4 Click Add-ons > ‘Switch to PowerShell 7’
#5 Run: $PSVersionTable
Check PS Version
Snapshot