Addons that haven’t seen a new release in the past years may not have updated their "works with" information. As far as I know, there’s little actual change between the basis of 0.9.6.3 and 1.0.5 - besides amazing updates, security fixes and other "hot stuff" you’re missing out on.
Nobody’s forcing you to jump on the MODX Revolution boat (although it sure is a hell of a ride), but you should do yourself a big favour and get up to speed and use 1.0.5. A while back I contacted some old clients who were still running (a modified) 0.9.6.3 to tell them that since the release of their website a lot of security fixes and other improvements were released and if they wanted an update (at a low cost).
To illustrate the difference between 0.9.6.3, 1.0.5 and 2.0.7, have a look at these images.
0.9.6.3

It does the job, but can be a little shaky and I wouldn’t dare saying it’s safe to be on board..
Evolution 1.0.5

Stabalized, improved, shiny. Much more efficient.
And Revolution 2.0.7

Do I need to say more?
Yes - it may be daunting to upgrade your ship, but it’s better then what you had, right?