As promised, a new arrange feature is available in Tabbles 1.1.7 beta1 (download it here).
Here is a video of the feature:
Arranging tabbles in different ways can be useful to quickly locate a tabble by eyeballing. For example, if you want to quickly locate the tabble you have opened ten minutes ago, you may want to sort tabbles by recent usage (i.e. with the "recently opened tabbles first" menu option).
If you used to like categories, the "group by color name" arrangement is for you.
The video cycles the available layouts (more layouts are coming).
I am planning to offer the same arrangements in the "quick-open tabble" dialog box as well.