adding 4.0 alpha 4

Author: benfry

content/static/download.html

@@ -50,6 +50,7 @@ <h3>Stable Releases</h3>
         <a href="https://download.processing.org/processing-3.5.4-linux64.tgz">Linux 64</a>
         <a href="https://download.processing.org/processing-3.5.4-macosx.zip">Mac OS X</a>
     </li>
+    <!--
     <li>
         <span class="version">3.5.3</span>
         <span class="version-date">(3 February 2019)</span>
@@ -60,7 +61,6 @@ <h3>Stable Releases</h3>
         <a href="http://download.processing.org/processing-3.5.3-linux-armv6hf.tgz">Linux ARMv6hf</a>
         <a href="http://download.processing.org/processing-3.5.3-macosx.zip">Mac OS X</a>
     </li>
-    <!--
     <li>
         <span class="version">3.5.2</span>
         <span class="version-date">(22 January 2019)</span>
@@ -265,6 +265,14 @@ <h3>Pre-Releases</h3>
     <ul>
     <!-- <li>No pre-release versions are currently available.</li> -->
 
+    <li>
+        <span class="version">4.0 alpha 4</span>
+        <span class="version-date">(15 June 2021)</span>
+        <a href="https://download.processing.org/processing-4.0a4-windows64.zip">Win 64</a>
+        <a href="https://download.processing.org/processing-4.0a4-linux64.tgz">Linux 64</a>
+        <a href="https://download.processing.org/processing-4.0a4-macosx.zip">Mac OS X</a>
+    </li>
+
     <li>
         <span class="version">4.0 alpha 3</span>
         <span class="version-date">(17 January 2021)</span>
@@ -273,6 +281,7 @@ <h3>Pre-Releases</h3>
         <a href="https://github.com/processing/processing4/releases/download/processing-1272-4.0a3/processing-4.0a3-macosx.zip">macOS</a>
     </li>
 
+    <!--
     <li>
         <span class="version">4.0 alpha 2</span>
         <span class="version-date">(15 September 2020)</span>
@@ -281,7 +290,6 @@ <h3>Pre-Releases</h3>
         <a href="https://github.com/processing/processing4/releases/download/processing-1271-4.0a2/processing-4.0a2-macosx.zip">macOS</a>
     </li>
 
-    <!--
     <li>
         <span class="version">4.0 alpha 1</span>
         <span class="version-date">(18 January 2020)</span>