The default path for the PC2A is "C:\Program Files\Cakewalk\Shared Utilities\Internal\PC2ALevelingAmplifier". This folder should contain the dll, chm and a resources folder. If the files are there, try running a VST reset from preferences. Make sure "Generate Scan Log" is enabled. If the plug-in fails to appear after the reset review the scan log for information about the plug-in. May need to reinstall the MS runtime libraries. See  
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