I have your icons for spider oak… you need to put them in /usr/share/icons/(what ever icon theme your using) and put them in the apps folder for their corresponding sizes… I have steam and Pragha in there also, they are apps I needed proper Icons for. You can get them here…
https://www.dropbox.com/sh/0z5b0dksk1dafa8/AABhEJR600CPkmtEfP0Okwada?dl=0