On Windows, if you want to find the plugin files yourself, or remove specific plugins manually:
VST2 Plugins:
NOTE: You were able to choose your own location for 32 and 64 bit
VST plugins during installation, so this might be different for you.
The following is the default location the Waverazor installer uses.
C:\Program Files\Steinberg\VSTPlugins\Waverazor64.dll
C:\Program Files\Steinberg\VSTPlugins\WaverazorFX64.dll
C:\Program Files (x86)\Steinberg\VSTPlugins\Waverazor32.dll
C:\Program Files (x86)\Steinberg\VSTPlugins\WaverazorFX32.dll
VST3 Plugins:
C:\Program Files\Common Files\VST3\Waverazor64.vst3
C:\Program Files\Common Files\VST3\WaverazorFX64.vst3
C:\Program Files (x86)\Common Files\VST3\Waverazor32.vst3
C:\Program Files (x86)\Common Files\VST3\WaverazorFX32.vst3
AAX Plugins:
C:\Program Files\Common Files\Avid\Audio\Plug-Ins\Waverazor.aaxplugin
C:\Program Files\Common Files\Avid\Audio\Plug-Ins\WaverazorFX.aaxplugin