Audirvana Plus Upgrade Problem


I am running Audirvana Plus, version 1.3.5, on a MacBook Air. It runs fine. However, if I try to upgrade I get the following warning:

"Audirvana Plus can't update when it is running from a read only volume like a disk image or an optical drive. Move Audirvana Plus to your Application folder, relaunch it from the there and try again"

I don't understand; Audirvana Plus is already resident in the Application Folder. What am I doing wrong?
mgattmch
Can I update this thread? I'd been using a trial copy and now I want a full license. I downloaded and followed Sidssp's instructions, clicking on the button to acquire a license. It sends me to the Finder, highlighting the iTunes folder, but I have no idea what it's point to. I don't see a folder or doc labeled Audirvana. So I'm stuck.

I've sent e-mails to Audirvana, and posted to a Facebook page about the new version. Their web site is down & no replies to my e-mails or Facebook post. Does anybody know anything about what's going on with them?
It should be in your "download's" folder. Even though it takes you to the Itunes folder, navigate to "download's" and you can select your license file from there.