Xcelsius 4.5 Down-level Hot Fixes?

I have 4.5 installed and upgraded to hot fix 10. Now, when I drop an accordion menu in and open the properties, there is no 'source data' field shown at all.

Another user upgraded to hot fix 10 and now she can't export to PowerPoint. (We're on Office 2007.)

Now, I had an Xcelsius file corrupt to the point it won't open but crashes out with an Excel error.

Is it possible to obtain down-level hot fix files? I need to get to at least hot fix 2 in order to work with the Excel 2007 .xlsx files but I don't think some of the higher versions fix anything I'm immediately concerned with.

Thanks for any information you can share as to the location of the older hot fix files.