To install LongoMatch, you will have to log in in LongoMatch's web. 

You will have to register if you are not already or If you do not remember you password, you can reset it here. 

Once you have logged in, you will have to specify the operative system you will work with. 

Note that, if it is the first time you install LongoMatch in your computer, you will get LongoMatch PRO during 15 days.