I had exactly the same problem, and took a look into it now..
I have solved it partly,- in the programfiles (x86) under the folder Arturia - Wurlitzer V, you have some programfiles installed,- the dll-file is normally placed in the VSTplugins folder, but if you see the rest of the instruments in the Arturia-folder, they all have copied the dll-file to its instrumentfolder too.
Now, that went easy with the 32bit version of the Analog Lab, but when I made a folder for the 64bit file, it just wouldn't turn up, so I'm not sure if the Analog detects the file from these folders or the vst-folder, which would be logical,- but it DID change for me when I copied the 32bit dll-file to the Wurlitzer folder.
Hope this helps you solve it on your setup.
So what causes this?
the only thing I can think of is that the wurlitzer doesn't copy the dll-files to the right folders in the installation process, but that's up to the Arturia developers to figure out.