Cannot uninstall libre office 4.4 and it is not listed in my installed programme list
You need to follow the instruction of your OS.
Windows XP, VISTA: you find Start > Control Panel > Add or Remove Programs > search LibreOffice and click uninstall
For W7 W8, W8.1 it should be similar but I cannot check.
If this information does not help, please help the helper to help you and provide information.
OS = ?. Lib.O version number = ?
Which steps to you took and what was the result of each step?
A helper needs to understand all and often needs to make simulations to provide you with an answer.