You are downloading the Thesaurus XAP file v188.8.131.52 for Windows Phone. Thesaurus is a free and useful Education app: Thesaurus in deutscher und englischer ... You can now download the offline XAP file to install & try it.
Download Locations for Thesaurus 184.108.40.206 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Thesaurus XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.