I tried that but still RB does not recognize the app (it does not get the bundle id if I try to drop it into the field). 
So we are still missing something. I paste below the info.plist with your new key added, the one that still does not work (I hope xml code does not create problems with the forum)

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE plist SYSTEM "file://localhost/System/Library/DTDs/PropertyList.dtd"> 
<plist version="0.9"> 
<dict> 
<key>CFBundleIconFile</key> 
<string>icon.icns</string> 
<key>CFBundlePackageType</key> 
<string>APPL</string> 
<key>CFBundleGetInfoString</key> 
<string>Created by Qt/QMake</string> 
<key>CFBundleSignature</key> 
<string>????</string> 
<key>CFBundleExecutable</key> 
<string>Livestation</string> 
<key>NOTE</key> 
<string>Please, do NOT change this file -- It was generated by Qt/QMake.</string> 
<key>CFBundleIdentifier</key>  
<string>com.livestation.livestation</string> 
</dict> 
</plist>