What I did is slightly different. I launched the VE standalone and then quit it to eliminate the license scanning process (which takes 2.5 minutes on my machine) from the AU validation process. I then opened Logic and the Autoload file opened. I then launched the AU Manager by selecting "Start Logic AU Manager" from the Logic Preferences submenu which is found under the Logic Pro menu (Logic Pro/Preferences/Start Logic AU Manager). The Autoload file disappears. In its place is a dialog box listing all the AU plugins. I checked the box next to the VE plugin which had previously failed validation. This causes it to rescan the VE plugin. It passed validation.
If this does not work for you, you might try the following:
1. Rebuild the startup disk's directory using Alsoft's DiskWarrior. (Starting the computer from the DiskWarrior CD.) This procedure has solved many problems for me that could not otherwise be fixed. For example: when Altiverb 6 was released, Logic could not see it and so no validation took place. Instead Logic produced an error message stating that Altiverb 5 was missing. I rebuilt the startup disk directory with DiskWarrior and Logic could then see and validate Altiverb 6. Over the years I have had many similar experiences with DiskWarrior. If you don't own DiskWarrior, get it. In my opinion, it is THE essential utility software for Macs. (No, I am not an employee of Alsoft!!)
2. Repair Permissions using Apple's Disk Utility.