It is not a "general" installation of OpenVPN that the user is supposed to use directly. It's simply a supporting module for one avast! feature - avast! SecureLine (i.e. part of avast! installation). So, it naturally doesn't appear in Add/Remove program itself (just as every single DLL in avast! installation folder doesn't show there).
You can go to Add/Remove programs, select avast! Antivirus, choose Change and Change - and then you can tell avast! to uninstall the feature(s) you don't want.
If you, the user, want to remove SecurLine in order to remove the Secunia PSI flag, then perform a change operation as igor says, either in Add/Remove or Programs and Features and then deselect SecureLine. Allow the change operation to complete.
One important step that is not readily apparent as avast! does
not ask the user to do so, is to reboot your system when the change process is completed.
This step must be done to ensure proper operation of whatever version of avast! you are running.
For example, if you use AIS, the built-in avast! firewall will not run correctly anymore, after the change operation is done, as the avast ndis filter driver is replaced during the change operation.
It will not run properly again until a reboot is done. Opening AIS after changing SecureLine to inactive status will show the avast firewall as running but
not reading incoming or outgoing packets at all; only after a system reboot, will it be back to normal and your avast! firewall will work as before.
You will also appear to have lost all application filtering rules before reboot, but these will all reappear after the reboot is done. And removing Securline from avast! features will also remove the PSI flag.
As always, use custom install for features and add-ons to remove anything you will not be using now or in the future, and this sort of thing should become a non-issue for most users.
