Uninstalling OpenPlant Orthographics Manager in Silent Mode

If you have the Setup.exe of OpenPlant Orthographics Manager, simply use the -Uninstall -Quiet commands to uninstall OpenPlant Orthographics Manager. For example,

C:\BentleyDownloads\OpenPlant Orthographics Manager\OpenPlant Orthographics Managerx64.exe -Uninstall -Quiet

If you don't have the Setup.exe, then use the following steps:

In Windows PowerShell, get the location of bootstrapper Setup.exe using the following command:
gci "HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall" | foreach { gp $_.PSPath } | ? { $_ -match "OpenPlant Orthographics Manager Update 11.1" } | select UninstallString

You will get the path, something like this:

UninstallString
---------------
"C:\ProgramData\Package Cache\{0c77a938-fe26-4e0c-8bc7-3f2064729d40}\Setup_OpenPlant Orthographics Managerx64.exe"  /uninstall

Use the above path in the command to uninstall the product silently:
Start-Process "C:\ProgramData\Package Cache\{0c77a938-fe26-4e0c-8bc7-3f2064729d40}\Setup_OpenPlant Orthographics Managerx64.exe" -ArgumentList "-Uninstall -Quiet" -Wait

Uninstalling Post-Install Components

To uninstall the post-install components such as Bentley DGN Index Service, Bentley DGN Preview Handler, and others, you will need their msiexec.exe and product GUID.

Get the product GUID using one of the following commands:
gci "HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall" | foreach { gp $_.PSPath } | ? { $_ -match "ProductName" } | select UninstallString

or

gci "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall" | foreach { gp $_.PSPath } | ? { $_ -match "ProductName" } | select UninstallString

Where, ProductName is the name of post-install component, such as Bentley DGN Index Service.
You will get product GUID, something like this:
```
UninstallString
---------------
MsiExec.exe /X{2E873893-A883-4C06-8308-7B491D58F3D6}
```
Use the string from the above step in the following command:
Start-Process "MsiExec.exe" -ArgumentList "/X{2E873893-A883-4C06-8308-7B491D58F3D6} /quiet" -Wait