title: No RTools compatible with R version 3.5.0 was found
body: <p>I had problems installing data.table for R version 3.5.0, and was advised to check that RTools was properly installed.</p>
  
  <p>After installing RTools 3.5 (this seems to be the latest) I typed </p>
  
  <pre><code>find_rtools(T)
  </code></pre>
  
  <p>I got the following message:</p>
  
  <pre><code>WARNING: Rtools is required to build R packages, but no version 
  of Rtools compatible with R 3.5.0 was found. 
  (Only the following incompatible version(s) of Rtools were found:3.4,3.5)
  
  Please download and install the appropriate version of Rtools from 
  http://cran.r-project.org/bin/windows/Rtools/.
  </code></pre>
  
  <p>So on the one hand it looks like I do have 3.5 installed, but it seems to think there is a newer/different version.</p>
  
  <p>Any thoughts?</p>