You are downloading the Pocket IRC XAP file v18.104.22.168 for Windows Phone. Pocket IRC is a free and useful Social app: irc client for windows ... You can now download the offline XAP file to install & try it.
Download Locations for Pocket IRC 22.214.171.124 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 Pocket IRC XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.