Smarky was our manager for Safari bookmarks.  Smarky is no longer being offered because, beginning with one of the Safari 11 releases, in Safari’s Bookmarks > Edit Bookmarks, there is a Sort By > contextual menu which will sort items.  This is certainly not as powerful and flexible as Smarky, but given that installing and maintaining Smarky is a bit of work, we feel that most users are better off using this this new function which is built into Safari.

Users who want to continue having the power of Smarky may upgrade to Synkmark at no cost.  When you upgrade to the final version of Smarky (which will probably be Smarky 2.9), it will show how to get the free license and migrate your data.