Hi Dave,
the VST Bass Amp actually needs two files:
FCP_SMT_005_Reverence_ImpulseLibrary_01.vstsound
FCP_SMT_005_Reverence_ImpulseLibrary_04.vstsound
please check, if both are there in your AppData\Roaming\Steinberg\Content\VST Sound
folder. If not, please reinstall.