Norton removing components of LibreOffice 4.02

Whilst installing latest build of LibreOffice 4.02 Norton removed files and gave me the following information

****************************

Filename: unopkg.bin
Threat name: Suspicious.MLApp
Full Path: e:\portableapps\libreofficeportable\app\libreoffice\program\unopkg.bin

____________________________

Details
Unknown Community Usage,  Unknown Age,  Risk High

Origin
Downloaded from Unknown

Activity
Actions performed: 2

____________________________

On computers as of Not Available
Last Used 06/04/2013 at 11:51:17
Startup Item No
Launched No

____________________________

Unknown
It is unknown how many users in the Norton Community have used this file.

Unknown
This file release is currently not known.

High
This file risk is high.

Threat type: Heuristic Virus. Detection of a threat based on malware heuristics.

____________________________

Source: External Media


____________________________

File Actions

File: e:\portableapps\libreofficeportable\app\libreoffice\program\unopkg.binRemoved
File: e:\portableapps\libreofficeportable\app\libreoffice\program\unopkg.exeRemoved
____________________________

File Thumbprint - SHA:
e86112197146378c896f56255e4f529805b594aad0897f24091aa86df9c7822f
File Thumbprint - MD5:
Not available

***********************************

When I try to load writer, calc etc LibreOffice crashes

Can someone help please?