Update README.md

Author: rii-mango

README.md

@@ -26,7 +26,7 @@ Compressed:
 
 [Click here](http://rii.uthscsa.edu/mango/daikon/index.html) to try the Daikon parser now...
 
-[Click here](http://rii.uthscsa.edu/mango/papaya/index.html) to try Papaya, a DICOM viewer that uses Daikon...
+[Click here](http://rii.uthscsa.edu/mango/papayabeta/) to try Papaya, a DICOM viewer that uses Daikon...
 
 ###Usage (Node.js)
 ####Single File