I still have not reinstalled, but I looked at the list of installed VSTs and I'm sure these work with 64-bit:
Instruments
Beatscape (works kinda of wonky but the samples are worth using)
Cakewalk Sound Center
Cyclone
Dimension Pro
Dreamstation (this one i'm not sure. i think i tried once)
DropZone
Pentagon (works but can be wiggy at times)
PSYN II
Rapture
Roland Groove Synth
RXP
Session Drummer 3
SFZ+ Pro works but sometimes acts weird when importing sf2 files
Square I (i booted it up once to see if it weas functional)
Studio Instruments Bass
Studio Instruments Drums
Studio Instruments E-Piano
Studio Instruments Strings
True Pianos
TTS-1
Z3TA+ Classic
Effects
Alias Factor
Classic Phaser
Stereo Compressor/Gate
HF Exciter
ModFilter
Para-Q Parametric EQ
Tempo Delay
Multivoice Chorus
Flanger
Studioverb 2
Boost 11 Peak Limiter
TL-64 Tube Leveler
TS-64 Transient Shaper
Analyst
Bit Meter
Amp Sim
Tape Sim
Pitch Shifter
Channel Tools
Sonitus suite
Perfect Space Convolution Reverb
PX-64 Percussion Strip
VC-64 Vintage Channel
VX-64 Vocal Strip
LP-64 EQ
LP-64 Multiband Compressor
MIDI FX
I tried the old dsp suite once and it did not work. that is sad because i liked those
Good news if there is something not on the list; most of the 32 bit vsts are redundant.