I am trying to upgrade my ISY994ZS PRO:

I found this page  which instructed me to download this file ISY 994i ZW, Z, or ZS Series (Z-Wave/Zigbee and/or if you do NOT have a PLM). It is a zip file. I click on Help->Manually->Manually Upgrade ISY->[OK]->[YES]->(find folder, modify name)->[Save]->choose Upgrade File->[Open] and then I get the error "Upgrade Failed :Invalid or incompatible upgrade file".   I tried both 5.3.0 and 5.3.4.

Clearing the Java cache (Control Panel=>Java=>[Settings]=>[Delete Files]) did not help.

I have a second ISY994i with both IR and Z-Wave.  I ran the above steps, re-installing 5.3.0 which was successful.

I had I noticed that on the previously linked page that one should upgrade to 5.3.2.  In searching for that release, I found a page that had a link to 5.3.4

I found this link to attempt with 5.2.0 -- No Joy.

 

Help.

After clicking on manually upgrade and get to the part that the file finder window opens, select the zip file you downloaded and process to upgrade.

You shouldn't be changing any file name. You should be using the zip just has it is without modification or unzipping.