@TIG

Yes, in SU 2024, not only File.exists? is removed, Fixnum in SU 2024 raise errors too.

see Ruby 3.2 full release notes here:
https://github.com/ruby/ruby/blob/v3_2_2/NEWS.md

We fixed in our plugins like this:

# Fix undefined method `exists?' error for Dir:Class, File:Class
# see: https://github.com/ruby/ruby/blob/v3_2_2/NEWS.md
# Removed methods:
# Dir.exists? [Feature #17391]
# File.exists? [Feature #17391]
Dir.respond_to?(:exists?) || Dir.singleton_class.alias_method(:exists?, :exist?)
File.respond_to?(:exists?) || File.singleton_class.alias_method(:exists?, :exist?)
defined?(::Fixnum) || Kernel.const_set(:Fixnum, Integer)

@Sl-m

It's too simple, edit the plugin file with notepad like this:

open a terminal with command "cmd", and copy the code, mouse right click or Ctrl + V to paste the code into the terminal.

notepad.exe "%HOMEPATH%\AppData\Roaming\SketchUp\SketchUp 2024\SketchUp\Plugins\Rotateplanview.rb"

find and remove the 's' from Line 76,
change "if File.exists?" to "if File.exist?" and save it.

reboot your SU 2024， it's ok now.