Try running the launcher in administrator mode. (Right click on the icon, "Run as Administrator")
Just a reminder, after Setup, when you select "Agree" to verification of owning the game and then click "Finish" on the last screen, you can just close the launcher, then reopen it to patch. You do not need to let it run the time consuming task of verify your files.
If that doesn't work, which there's no reason why it shouldn't (unless it throws an error), you can navigate to you patch directory, copy the "sr_patch8.tre," "strings" folder and "texture" folder and copy that to your "unpatched" installation. Those are the only files that have been patched since the new launcher.