I would not work on 64 bit. Downloaded the 32 bit version of SU and worked fine. Haven't tried new link.

Can someone help. Ive tried deleting and reloading the MSphysics and ams files but keep getting this load error.

Error Loading File C:/Users/Brian/AppData/Roaming/SketchUp/SketchUp 2016/SketchUp/Plugins/MSPhysics/main.rb
Error: #<LoadError: 126: The specified module could not be found. - C:/Users/Brian/AppData/Roaming/SketchUp/SketchUp 2016/SketchUp/Plugins/MSPhysics/win64/2.0/msp_lib.so>
C:/Program Files/SketchUp/SketchUp 2016/Tools/RubyStdLib/rubygems/core_ext/kernel_require.rb:45:in require' C:/Program Files/SketchUp/SketchUp 2016/Tools/RubyStdLib/rubygems/core_ext/kernel_require.rb:45:in require'
C:/Users/Brian/AppData/Roaming/SketchUp/SketchUp 2016/SketchUp/Plugins/MSPhysics/main.rb:23:in <top (required)>' C:/Program Files/SketchUp/SketchUp 2016/Tools/extensions.rb:197:in require'
C:/Program Files/SketchUp/SketchUp 2016/Tools/extensions.rb:197:in load' C:/Users/Brian/AppData/Roaming/SketchUp/SketchUp 2016/SketchUp/Plugins/MSPhysics.rb:119:in register_extension'
C:/Users/Brian/AppData/Roaming/SketchUp/SketchUp 2016/SketchUp/Plugins/MSPhysics.rb:119:in <module:MSPhysics>' C:/Users/Brian/AppData/Roaming/SketchUp/SketchUp 2016/SketchUp/Plugins/MSPhysics.rb:101:in <top (required)>'