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rvm list known
rvm install ruby@latest
ruby -v
## If it still shows you ruby 2.0., run rvm use ruby-X.X.X --default.

# Easiest way: download the installer from 
https://rubyinstaller.org/
  
# credit to Stack Overflow user in the source link

choco upgrade ruby

sudo rvm get head
sudo rvm install ruby-2.7.4-railsexpress
rvm use --default ruby-2.7.4-railsexpress

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