SIGSEGV Spotlight error
From your report it looks like the Wondershare is a problem maker and slowing down the Spotlight.

/Users/username/Library/Group Containers/QA2G25RMZ4.com.wunderkinder/Wunderlist/.DS_Store


Shut the Wunderlist down.

You might want to consider giving the Spotlight a break so it can start over.

Turn it off

sudo mdutil -a -i off


this turns off indexing of files, 

To turn indexing back on, run

sudo mdutil -a -i on


After this you could run the complete re-indexing of your hard drive (be aware this could be an over night job), it will delete your Spotlight data base forcing it to start over.

sudo rm -rf /.Spotlight-V100/*