If you have to uninstall the old messenger first before installing the new version, you may need to do the following to keep the old chat logs, office list, etc. Otherwise, these information may get lost. 1) Exit current messenger 2) use a file explorer to enter folder "/sdcard/HomeMeeting/msgr" 3) Copy the following 5 files to a separate folder emoticon.txt: contain the emoticons that you added. You can skip this file if you never add new emoticons. imlog.txt: IM chat log in plain text imxmllog.txt: IM chat log in XML format (with font, color etc.) wbmsgrlog.txt: messenger log file. You can skip this file, it is just a log file weboffice.wbl: office list. You can choose to only backup two files: imxmllog.txt(chat log) and weboffice.wbl(office list) 4) Uninstall the current messenger 5) Install the new messenger 6) Run messenger and check whether office list and chat log are lost. If they are not lost, no further action. 7) If the information are lost, exit messenger, and then copy the saved files in step 3) back to the folder "/sdcard/HomeMeeting/msgr", re-run messenger, the information should be back. Note, you can also use the above steps to transfer chat log and office list to a different device.