Monday, February 20th, 2017
The direct version of Soulver for Mac began crashing on launch on February 19, 2017, due to an expired developer code-signing certificate. We have released Soulver 2.6.1 which fixes the problem, and includes a renewed certificate valid for the next five years. Our sincerest apologies for the inconvenience.
Other apps distributed outside the Mac App Store that access iCloud on Sierra may also begin crashing on launch. This article explains the problem & solution in more detail.