The 7352 requires 9.6.0 or higher (9.6.1 is the latest and recommended). The ZD won't successfully upgrade from the version you are currently on to 9.6.1 without going through intermediate steps.
The KB article detailing the upgrade path you take is here: https://support.ruckuswireless.com/an...
The good news is the ZD will automatically upgrade the 7352 for you once it has the proper version.
Since you have a partner (rwbigdog) account, go ahead and log into the partner portal and follow the signs to Support. You'll be able to download via that path.