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If you have previously used the NEM software (0.5.19 or lower), you need to ensure that the old software and any old NEM user data has been removed from your computer before installing the live net software. Otherwise it may cause problems if old data is picked up by the new software.
For those who have used the installer version1) Windows: Please go to control panel and then go to "Programs" and then to "Programs and Features" and then select NEM which should be in the list. This should remove the NEM software. With Windows Vista/7, you will find the uninstallation option by going to "control panel" and then "Programs and Features". Mac: Go to "Finder", then go to "Applications", then go to "Nem Wallet", and then click on "uninstall".
2) Windows: Once you have done this, please go to "c:\Users\%YourUserName%\" and delete the "nem" folder that you should see. Mac: Go to "Finder", then click "Go" at the top of the screen. Go to "Computer", then "Macintosh HD", then "users", then your user name, and then delete the "NEM" folder.
For those who have used the standalone version1) Windows & Mac: If you have been using the standalone version, delete the "package" folder. Only you will know what location that is in.
2) Windows: Once you have done this, please go to "c:\Users\%YourUserName%\" and delete the "nem" folder that you should see. Mac: Go to "Finder", then click "Go" at the top of the screen. Go to "Computer", then "Macintosh HD", then "users", then your user name, and then delete the "NEM" folder.
If anyone has any issues in removing the NEM software, please do not hesitate to contact a member of the team via the NEM forum or the Help desk.
Thank you.
This is a companion discussion topic for the original entry at http://blog.nem.io/how-to-remove-old-nem-software-versions/