Cubase 5 VST plugins not showing up

Hello. I have a problem with cubase 5. I downloaded 64bit vst plugins. untill now i used 32bit. i paste them into the
c:program files/vst plugins
and they dont show up in cubase when i update plugins. but they do show up in reaper. please dont tell me to use reaper because i am used to cubase.
my 32 bit plugins are in c:program files(86)/steinberg/vstplugins
i know that 64 bit plugins most be in normal program files. why dont they appear?

my specs:

  • windows 10
  • cubase 5
  • 64 bit sistem
  • 64 bit and 32 bit vst plugins