Powershell Get Installed Version of Software F-Secure

The Script should find out if F-Secure is installed and when installed get the Version: This works for me:

$fsecure= (Get-ItemProperty HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\* | Select DisplayName, DisplayVersion | findstr "F-Secure")
$fver = (Get-ItemProperty HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\* | Select DisplayName, DisplayVersion | Where-Object {$_.DisplayName -like '*F-Secure*'} | % {$_.DisplayVersion})

When the Client has more then one Version of F-Secure installed I need to handle all values. How can I do that?

Example Output:

F-Secure Client Security Premium - AntiVirus & AntiSpy-Schutz 14.55.111

F-Secure Client Security Premium - Ger?testeuerung 2.00.102

F-Secure Client Security Premium - Internet-Schutzschild 10.10.110

F-Secure Client Security Premium - Software-Updater 2.21.1646

F-Secure Client Security Premium 13.11 13.11

In this case $fver should be 13.11. But because all values start with the same name I don't know how to handle it.