Original Blackmagic Video Assist 5" - Last Firmware?

Looking for some assistance relating to the original Blackmagic Video Assist 5"

Haven't used it in a long while but wanting to check what the last supported firmware is for this model please.

Searching on the downloads section of the website just brings up every version of Video Assist update.

Downloaded the latest one and doesn't offer option to update so presumably this product reached a point where there was a last supported firmware.

I currently have it running 2.5.1 - can anyone shed some light on whether this is as far as it'll go, or whether there's any other versions beyond?

Thanks in advance!

I have 3.4.1 but it didn't seem to add any functions over earlier versions

I'm also running 2.5.1 and am pretty sure there have been no updates for this model since that version; if you run the latest version of the update software it doesn't apply any updates.