Your save file can be found on:
C:\Users\YOURUSERNAME\AppData\LocalLow\AnomalyGames\The Fermi Paradox

Then you must choose between the 3 saves files, they should be named as: fermi_save_#.sav

After fiding and selecting the save file that you want to edit, you must access a save editing website[www.saveeditonline.com]

Now, you can follow this step-by-step to make it work properly:

1. Load your file into the save editing website
2. Search for "points" (NOT SYNTHESIS)
3. Edit both the "m_currentProbabilityPoints" and "m_displayedProbabilityPoints" numbers to your desired numbers of Synthesis
4. Download the new savefile
5. Delete/Move the old savefile
6. Move the new savefile to C:\Users\YOURUSERNAME\AppData\LocalLow\AnomalyGames\The Fermi Paradox
7. Launch the game and load the save
8. Have Fun!

Video if you dont want to read: