Error running Data Input Tool_unable to install R packages

Hello,

I have downloaded and installed on my Windows laptop the Model Evaluation toolkit Version 4.0 and followed the instructions on the user's guide to install it (I also installed R 3.2.3).

After creating all the input files and trying to run the Data Input Tool, this is what I read in the log file:


Model Evaluation Toolkit version 4.0: Data Input Tool
Internal version SVN 1942 (2016-01-29)
Running in R version 3.2.3 (2015-12-10)
Thu Jun 30 09:31:46 2016

Importing pollutant details...
Importing obs data pollutant details...
Importing station details...
Setting the CRAN mirror...
Updating installed R packages...
Warning in install.packages(update[instlib == l, "Package"], l, repos = repos, :
'lib = "C:/Program Files/R/R-3.2.3/library"' is not writable
Error in install.packages(update[instlib == l, "Package"], l, repos = repos, :
unable to install packages
Calls: update.install.load.packages -> update.packages -> install.packages
Execution halted

Any thoughts please?
Thank you!
Filio