I have been using Sandvox since 2014. I migrated from iWeb. It does not have an exciting bunch of templates, but for what I do, it is satisfactory. That is until recently. I want to do a clean instal of Mojave and wrote to Sandvox to ask if I need to be careful of anything. I seem to have misplaced my key, so I wanted to get that as well.
I’ve written to them twice with their on-site email service. They say they will return with advice within business day. I wrote on Dec. 1, 2017 and now it is Dec. 7, 2017. I don’t dare do my clean instal until I hear from them for fear that I’ll lose the application and won’t be able to update my website. Something I do every week.
I’ve seen a few similar comments by others in their forum pages.
The Karilia website (Karilia is the software company that developed Sandvox) looks like it is a live product with lots of support. However, I’m now nervous that they’re not there anymore or in serious trouble (money or resources). I’ve never used RapidWeaver, but when I looked at their tutorials I have to agree with what I’ve seen written here and in other places. That is to say, OK when you’re done, but a tremendous pain to get there.

I’m stymied. I don’t know what to do. I guess I’ll keep bugging Karilia for a bit longer and, if no response, I’ll have to move to any application. This is a whole bunch of man-hours that I really didn’t want to have to do right now.