I 'designed' it using Tinkercad. Yes, it probably does have the ability to change - I just ain't found it.
Same as the slicing software, I just use Halotbox as I know it is set up for my entry level Halot One printer.
When I find something I'm happy with, I tend not to change - I still use a 2011 version of Zoombrowser that came with a Canon camera I bought back then. I'm still using that as well.