1.How to save current column setup to a set
Unfortunately you can not do that. Yet! But that sounds like a good thing to include. So I will try to include this in the next version.
2. How to make my column set default (without assign it to all drives manually)
You should be able to change the "Default" column set in the Column Set editor. But it looks like there is an error here. the default column set is not displayed. I will try fix this.
A workaround is to create a new column set. And then under "Autoload on Path" you add all the paths or drives you want that column set on. And if you enter root paths this will overtake the default columnset for that drive.
Be sure to also check the "Valid for all subpath under this path" when adding paths.
See Attachment for screen shot
- Mathias