FAIL.

I launched this, did one exchange of messages with my wife's iPhone to verify it worked. Then the laptop started performing poorly. I popped up Activity Manger, which showed the process using over 8gb of virtual memory, with VM usage increasing as I watched.

I force-quite the app and removed it.

1. Crashes arbitrarily when I leave it open.
2. "Check for updates" takes me to the Skype homepage. That's not what it should do. It should actually "check for updates' based on the version I'm running, and either say 'you have the latest' or take me to the specific download page.
3. Configuration settings are Windows-Specific.

The app works, but poorly.

I've been using this for a while (HDRtist and then HDRtist Pro.) This is a very good product at a good price. The alignment algorithm is particularly important to me since most of my shooting is freehand, and there's wiggle in snapping 3 images. The presets provide a nice set of options to choose from, either to get a quick result or to get you started on more specific adjustments by seeing a range of possible enhancements.

I've tried several incremental backup utilities. Synk 6 was what I used to use, even though a -really stupid- default burned me badly. But Synk 7 changed its approach to something I didn't want. Carbon Copy Cloner's incremental backups is solid technology but a hard-to-configure user interface.

SFFS is what I've been using for the last month or so. It has A LOT of configuration options, and sometimes you have to hunt to find what you want. The biggest limitation for me right now is that it doesn't have a facility to allow me to auto-mount disk images (I use encrypted disk images for backing up sensitive data.) When running in interactive mode there are a lot of windows.

But aside from the user interface quirks, I've found it to be fast and reliable, which is what really counts.

Like others, I've used Synk for a long time and had a pattern of use for it, specifically for -periodic scheduled backups- and -back this up right now-

Unfortunately, Decimus has decided these modes of operation are no longer 'user friendly'. They've decided that "always synchronize in background mode" is the only legitimate mode for the application.

Additionally, they have not recognized the user interface problem I pointed out to them (one that caused me to lose hundreds of vacation photos), where a default setting is -destructive- ("Extra files in destination" default is "remove if previously in source")

I'm really sorry they moved in this direction, because Synk no longer fits my needs. Time to learn rsync().

If you can't install updates of things you've already purchased through the App Store, it's possible the Spotlight indexing the store depends on has gone bad. Open System Preferences -> Spotlight, click on the Privacy tab. Add your hard drive (e.g. "Macintosh HD"). Close that window and reboot. Then open System Preferences -> Spotlight, click on the Privacy tab, and remove "Macintosh HD". Let the index rebuild, and then re-launch the App Store. I had 2 updates that would not load, this fixed one of them. (I'm still trying to figure out how to fix the other update.)