Applications generated by CA Gen 8.5 (or CA Gen 8.6) with Visual Studio 2010 run without a manifest file.
The token “OPT.APPMANIFEST” has no impact with CA Gen 8.5 Visual Studio 2010, or with CA Gen 8.6.
If it is desired to use an application manifest file, you have to copy an <application>.exe.manifest to the location of the .exe. It will be used when it is available within this location.
The token “OPT.APPMANIFEST” is described in the CA Gen 8.5 & CA Gen 8.6 wiki under “Working with Profile Tokens in Build Tool” within the section “C profile tokens”