This is PowerShell using PSAppDeployToolkit (which I highly suggest using) but should be customizable for your needs (to specifically target version 11, for example).

$detPackage = Get-Package -Name 'Laserfiche*' -ProviderName msi -ErrorAction SilentlyContinue | Where-Object {$_.Name -match 'Laserfiche Client.+'}
If ($detPackage) { $detPackage  | Uninstall-Package }

The issue with attempting to uninstall using SetupLF.exe is that it can error out if the installed version does not match the version of your SetupLF.exe.