
The FM 2017 Editor is a powerful editing tool that allows you to modify the FM17 database. For optimal performance it is recommended that you use the FM2017 Editor on a high-end machine with at least 2GB RAM or more.
Due to the massive amount of data stored in the Football Manager database you may experience poor or slow performance on low-end systems.
It is really simple to install the official editor, just follow these two steps:
Please make sure you have downloaded Football Manager 2017 before downloading the editor. You need to download it separately through Steam.
Open Steam > Library > Tools > Football Manager 2017 Editor

Once you found it double click and it should bring up a pop-up window for installation. Here you can change the installation path and should it install or not desktop and start menu shortcuts.
As you can see from the picture below, size of the FM17 editor is 135 MB, make sure you have enough space available at the location where you're about to install the software.

About FM 2017 Pre-Game Editor
One of the most requested features this year in the Pre-Game Editor was a change to how competition boundaries are set. As a result, it’s now possible to use local regions, so you can confine your competitions to regional groups or even limit them to particular cities.
Also included are more detailed explanations of the different editor options and how they’re used, which should make the whole experience of using the editor much easier for new and existing users and allow everyone to benefit fully from the Editor’s full power.
For those who like to create entirely new teams, we’ve added an option to create random kits. It’s even possible to ‘group select’ clubs and randomise all of their kits at once. Doing this ensures that all of the selected clubs will have different coloured kits with different styles.
We’ve also added an ‘undo’ feature, meaning that changes to competition rules can be undone by using a slider to determine how many you’d like to revert, while database changes are now grouped into a single place where they can be removed individually or all at once.
And there are plenty more changes too, including the ability to add non-player future transfers to the editor, add dates/season into the top goalscorer record for competitions, there are new custom filters, you can change domestic competition colours, there are some new basic rules (such as third-place play-off functionality) and the computer can even help fill in a player’s missing stats by being able to choose his role.