Here is the solution I found. I was not running EMC's Unisphere VNX Client, I was just letting Firefox or IE connect to the control station and launch Java, which won't work anymore. Using the client with IE works, for me anyway. Here is what I did:  - downloaded and installed the Unisphere VNX Client - Set IE to be the default browser - Launched the client   Perhaps that's what I was supposed to be doing all along, but Firefox / Java had been working for me for quite a while.
I have been running Unisphere to access our VNX7500's using 32-bit Firefox and the latest 32-bit Java on Windows 7 Enterprise for probably more than a year with no issues (I gave up on IE a while ago). Last night, I allowed Firefox to update to version 52 and that version has disabled most plugins, including apparently the plugin used by Unisphere on the VNX1's, as all I can get is the satanic "you need at least Java 1.6 blah blah blah" message. I tried all combinations of Java 32/64 and IE/FIrefox. I was able to login to a VNX2 with some combinations (IE11 and 32-bit Java I think) but any attempt to login to a VNX1 just gets the Java error.  I finally "solved" the problem by reverting to a March 10th copy of my Windows VM, but that's obviously not a permanent solution. I'm wondering what combinations of Java/browser folks are using to access Unisphere on the VNX1's, as I could not find a combination that works.
Unable to access VNX1 via Unisphere with IE or Firefox