Hi Buddy, The published explorer.exe is the same as published Desktop, so you can't use this method. Can you please check this KB article and see if it applies? [URL] 
Hi All, I have a little issue with a managed application that is available from our quest management 7.6 install. Basically the application is just a simple one that runs c:\Windows\explorer.exe and has an arguement to a UNC path / mapped drive letter.   My issue is, it works fine with just this one particular user but for no one else. I cannot for the life of me work it out. Any other application I publish for a user works fine. Its configured for access from an vWorkspace Connector via web browser.  Any help with this would be great. PS i believe this has only happened since we upgraded to 7.6.  I can provide screen shots or more information if needed. Thanks Buddy.
vWorkspace & Windows Explorer