Yes, it would sometimes be useful if there was more than one "old" version of the software available.
At the moment, the site offers 1.7.4 as the current version, and 1.6.6 as a previous version.
In my case, 1.6.6 makes nice meshes, but doesn't play nicely enough with my two different GPU cards, and keeps falling back to using the CPU (slow...). 1.7.4 seems to have had a lot of further work done on it to make GPU handling slicker, but has a mesh problem with highest/ultra-high alignment and mesh-from-depthmap.
1.7.3 might solve both issues, but I don't see any way to download it from the site.
hmph.