Citrix has released a new version of Citrix Receiver for Windows, new version reported is 4.2.100.14
Download installation file :
http://www.citrix.com/go/receiver.html
Changes is this version:
http://support.citrix.com/article/CTX138197
Spring Forward to Receiver for Windows 4.2.100 (The Citrix Blog post)
http://blogs.citrix.com/2015/04/14/spring-forward-to-receiver-for-windows-4-2-100/
And finally documentation:
http://support.citrix.com/proddocs/topic/receiver-windows-42/receiver-windows-42-wrapper.html