title: Why is Ruby not updating after updating with Ruby Installer?
body: <p>I am currently have Ruby version 2.2.6 installed on my Windows 10 machine but need to update order to use the shopify_app gem. I downloaded Ruby 2.5.1-2 (x64) wıthout the devkit as it says on the Ruby Installer site and followed the prompts. I seemingly finished the installation , but entering <code>ruby -v</code> in the command line tells me I am still useing version 2.2.6. I have also tried <code>bundle update</code> which gives the following:</p>
  
  <pre><code>C:\Sites\postgresapp&gt;bundle update
  The dependency byebug (&gt;= 0) will be unused by any of the platforms Bundler is installing for. Bundler is installing for x86-mingw32 but the dependency is only for ruby. To add those platforms to the bundle, run `bundle lock --add-platform ruby`.
  Fetching gem metadata from https://rubygems.org/...........
  Fetching gem metadata from https://rubygems.org/..
  Resolving dependencies........
  Using rake 12.3.1
  Using concurrent-ruby 1.0.5
  Using i18n 1.0.1
  Using minitest 5.11.3
  Using thread_safe 0.3.6
  Using tzinfo 1.2.5
  Using activesupport 5.0.7
  Using builder 3.2.3
  Using erubis 2.7.0
  Using mini_portile2 2.3.0
  Using nokogiri 1.8.4 (x86-mingw32)
  Using rails-dom-testing 2.0.3
  Using crass 1.0.4
  Using loofah 2.2.2
  Using rails-html-sanitizer 1.0.4
  Using actionview 5.0.7
  Using rack 2.0.5
  Using rack-test 0.6.3
  Using actionpack 5.0.7
  Using nio4r 2.3.1
  Using websocket-extensions 0.1.3
  Using websocket-driver 0.6.5
  Using actioncable 5.0.7
  Using globalid 0.4.1
  Using activejob 5.0.7
  Using mini_mime 1.0.0
  Using mail 2.7.0
  Using actionmailer 5.0.7
  Using activemodel 5.0.7
  Using activemodel-serializers-xml 1.0.2
  Using arel 7.1.4
  Using activerecord 5.0.7
  Using activeresource 5.0.0
  Using bindex 0.5.0
  Using bundler 1.16.2
  Using coffee-script-source 1.12.2
  Using execjs 2.7.0
  Using coffee-script 2.4.1
  Using method_source 0.9.0
  Using thor 0.20.0
  Using railties 5.0.7
  Using coffee-rails 4.2.2
  Using multipart-post 2.0.0
  Using faraday 0.12.2
  Using ffi 1.9.25 (x86-mingw32)
  Using graphql 1.8.5
  Using graphql-client 0.13.0
  Using hashie 3.5.7
  Using multi_json 1.13.1
  Using jbuilder 2.7.0
  Using jquery-rails 4.3.3
  Using jwt 1.5.6
  Using multi_xml 0.6.0
  Using oauth2 1.4.0
  Using omniauth 1.8.1
  Using omniauth-oauth2 1.5.0
  Using omniauth-shopify-oauth2 1.2.1
  Using pg 0.21.0 (x86-mingw32)
  Using puma 3.12.0
  Using sprockets 3.7.2
  Using sprockets-rails 3.2.1
  Using rails 5.0.7
  Using rb-fsevent 0.10.3
  Using rb-inotify 0.9.10
  Using sass-listen 4.0.0
  Using sass 3.5.7
  Using tilt 2.0.8
  Using sass-rails 5.0.7
  Using shopify_api 4.12.0
  Fetching shopify_app 8.2.6
  Installing shopify_app 8.2.6
  Gem::InstallError: shopify_app requires Ruby version &gt;= 2.3.1.
  An error occurred while installing shopify_app (8.2.6), and Bundler cannot
  continue.
  Make sure that `gem install shopify_app -v '8.2.6' --source
  'https://rubygems.org/'` succeeds before bundling.
  
  In Gemfile:
    shopify_app
  </code></pre>
  
  <p>EDIT: ADD GEMFILE</p>
  
  <pre><code>source 'https://rubygems.org'
  
  git_source(:github) do |repo_name|
    repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?("/")
    "https://github.com/#{repo_name}.git"
  end
  
  gem 'shopify_app', '~&gt; 8.2.6'
  # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
  gem 'rails', '~&gt; 5.0.6'
  # Use postgresql as the database for Active Record
  gem 'pg', '~&gt; 0.18'
  # Use Puma as the app server
  gem 'puma', '~&gt; 3.0'
  # Use SCSS for stylesheets
  gem 'sass-rails', '~&gt; 5.0'
  # Use Uglifier as compressor for JavaScript assets
  gem 'uglifier', '&gt;= 1.3.0'
  # Use CoffeeScript for .coffee assets and views
  gem 'coffee-rails', '~&gt; 4.2'
  # See https://github.com/rails/execjs#readme for more supported runtimes
  # gem 'therubyracer', platforms: :ruby
  
  # Use jquery as the JavaScript library
  gem 'jquery-rails'
  # Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
  gem 'turbolinks', '~&gt; 5'
  # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
  gem 'jbuilder', '~&gt; 2.5'
  # Use Redis adapter to run Action Cable in production
  # gem 'redis', '~&gt; 3.0'
  # Use ActiveModel has_secure_password
  # gem 'bcrypt', '~&gt; 3.1.7'
  
  # Use Capistrano for deployment
  # gem 'capistrano-rails', group: :development
  gem 'simple_form'
  
  
  group :development, :test do
    # Call 'byebug' anywhere in the code to stop execution and get a debugger console
    gem 'byebug', platform: :mri
  end
  
  group :development do
    # Access an IRB console on exception pages or by using &lt;%= console %&gt; anywhere in the code.
    gem 'web-console', '&gt;= 3.3.0'
  end
  
  # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
  gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
  "gem 'shopify_app'"
  </code></pre>
  
  <p>How can I complete the installation of the latest version of Ruby?</p>