Searching for an “RStudio data recovery registration key” is a dead end for three reasons:
When you purchased RStudio, you likely received an email with your registration key. Search your email inbox, including the spam folder, for an email from RStudio with the subject "RStudio License Information." This email should contain your registration key. rstudio data recovery registration key
To avoid losing your RStudio registration key in the future, follow these best practices: including the spam folder