Unique 64 bit VST failed in Digital Performer 8 on Windows

[Tzakuk]

I have installed Unique several times according to the instructions.

The User Manual suggests that when installed as 64 bit, the 32 bit .dll is written to C:\Program Files(x86)\Steinberg\VSTPlugins and the 64 bit .dll is written to C:\Program Files\Steinberg\VSTPlugins.

There is a file called Unique.dll in each of these locations, however, the VST fails to load in Digital Performer 8.0 - 64 bit. 32 bit runs Unique with no trouble.

Is there any way to verify that the correct .dll is in the 64 bit folder? Is there any difference between the 32 bit and 64 bit .dll files? Is there another possible reason that DP8-64 is failing to load the plugin?

Windows 8.1 64 OEM, ASUS A55BM-E, AMD A10-7850K 4CPU+8GPU R7 @3.7Ghz, 16GB DDR3@1600 (PC3 12800), 1TB WD Blue SATA 6.0Gb/s