Thanks for the ideas. My download of Sketchup is legit. It has been only since getting and removing a wicked virus did I start having issues. I tried repair to no avail and will now try the reinstall. Many thanks,

WK

Sketchup Pro15, NO 3rd Party Plugins:
I am getting the following Loading Error Message. This is following a Hack job from a Ransomware group.

Error Loading File su_advancedcameratools.rb
Error: #<ArgumentError: invalid byte sequence in UTF-8>
C:/Program Files (x86)/SketchUp/SketchUp 2015/Tools/extensions.rb:99:in split' C:/Program Files (x86)/SketchUp/SketchUp 2015/Tools/extensions.rb:99:in block in load_extension_info'
C:/Program Files (x86)/SketchUp/SketchUp 2015/Tools/extensions.rb:76:in each' C:/Program Files (x86)/SketchUp/SketchUp 2015/Tools/extensions.rb:76:in load_extension_info'
C:/Program Files (x86)/SketchUp/SketchUp 2015/Tools/extensions.rb:38:in initialize' C:/Users/WARREN/AppData/Roaming/SketchUp/SketchUp 2015/SketchUp/Plugins/su_advancedcameratools.rb:29:in new'
C:/Users/WARREN/AppData/Roaming/SketchUp/SketchUp 2015/SketchUp/Plugins/su_advancedcameratools.rb:29:in <top (required)>' Error Loading File su_dynamiccomponents.rb Error: #<ArgumentError: invalid byte sequence in UTF-8> C:/Program Files (x86)/SketchUp/SketchUp 2015/Tools/extensions.rb:99:in split'
C:/Program Files (x86)/SketchUp/SketchUp 2015/Tools/extensions.rb:99:in block in load_extension_info' C:/Program Files (x86)/SketchUp/SketchUp 2015/Tools/extensions.rb:76:in each'
C:/Program Files (x86)/SketchUp/SketchUp 2015/Tools/extensions.rb:76:in load_extension_info' C:/Program Files (x86)/SketchUp/SketchUp 2015/Tools/extensions.rb:38:in initialize'
C:/Users/WARREN/AppData/Roaming/SketchUp/SketchUp 2015/SketchUp/Plugins/su_dynamiccomponents.rb:30:in new' C:/Users/WARREN/AppData/Roaming/SketchUp/SketchUp 2015/SketchUp/Plugins/su_dynamiccomponents.rb:30:in <top (required)>'
Error Loading File su_sandbox.rb
Error: #<ArgumentError: invalid byte sequence in UTF-8>
C:/Program Files (x86)/SketchUp/SketchUp 2015/Tools/extensions.rb:99:in split' C:/Program Files (x86)/SketchUp/SketchUp 2015/Tools/extensions.rb:99:in block in load_extension_info'
C:/Program Files (x86)/SketchUp/SketchUp 2015/Tools/extensions.rb:76:in each' C:/Program Files (x86)/SketchUp/SketchUp 2015/Tools/extensions.rb:76:in load_extension_info'
C:/Program Files (x86)/SketchUp/SketchUp 2015/Tools/extensions.rb:38:in initialize' C:/Users/WARREN/AppData/Roaming/SketchUp/SketchUp 2015/SketchUp/Plugins/su_sandbox.rb:34:in new'
C:/Users/WARREN/AppData/Roaming/SketchUp/SketchUp 2015/SketchUp/Plugins/su_sandbox.rb:34:in <module:SandboxTools>' C:/Users/WARREN/AppData/Roaming/SketchUp/SketchUp 2015/SketchUp/Plugins/su_sandbox.rb:29:in <top (required)>'
Error Loading File su_webtextures.rb
Error: #<ArgumentError: invalid byte sequence in UTF-8>
C:/Program Files (x86)/SketchUp/SketchUp 2015/Tools/extensions.rb:99:in split' C:/Program Files (x86)/SketchUp/SketchUp 2015/Tools/extensions.rb:99:in block in load_extension_info'
C:/Program Files (x86)/SketchUp/SketchUp 2015/Tools/extensions.rb:76:in each' C:/Program Files (x86)/SketchUp/SketchUp 2015/Tools/extensions.rb:76:in load_extension_info'
C:/Program Files (x86)/SketchUp/SketchUp 2015/Tools/extensions.rb:38:in initialize' C:/Users/WARREN/AppData/Roaming/SketchUp/SketchUp 2015/SketchUp/Plugins/su_webtextures.rb:26:in new'
C:/Users/WARREN/AppData/Roaming/SketchUp/SketchUp 2015/SketchUp/Plugins/su_webtextures.rb:26:in <module:WebTextures>' C:/Users/WARREN/AppData/Roaming/SketchUp/SketchUp 2015/SketchUp/Plugins/su_webtextures.rb:20:in <top (required)>'

I am perfectly happy to reinstall if need be. Any ideas?
Many Thanks.
WK