Upgrading to 1.1 received msg "The MD5 hash of the downloaded file does not match. Please contact our support team to look into this"

Question

Upgrading to 1.1 and received message &quot;The MD5 hash of the downloaded file does not match. Please contact our support team to look into this.&quot; I selected 'install' after adding extension - was this teh reason why - the prompt suggested I ignore the install and continue...