If you are running windows 10, follow these steps:

1) Locate where your game is installed. (e.g. if installed via steam, go to Steam>steamapps>common>NavyFIELD. If installed through this website, look in the default directory)

2) Right click on NavyFIELD (application). Go to properties. Under the compatibility tab, click "Change settings for all users." You should now have a pop-up dialog box. Check "Run this program in compatibility mode for:" and select Windows XP serivce pack 2. Check "Run this program as an administrator." Repeat these steps for NavyFIELD_Launcher, which should be located in the same directory. 

3) Open your control panel > System and Security > System > Advanced System Settings (on the left side). In the advanced tab, locate the performance section and click Settings.  You should now have a pop-up dialog box titled "Performance options." Go to the Data Execution Prevention tab. Tick "Turn on DEP for all programs and services except those I select." Add NavyFIELD and NavyFIELD_Launcher to this list. 

4) Restart your computer.

You should notice a significant decrease in crashes.

Me too.... I'm tired about that... Can somebody help me?? My PC information to better help.  Thanks so much in advance =)

some have reported that the manual patch WIN XP SUPPORT helps with the crashing after each game issue 

try down loading that        
unzipping those files into the proper NFNA folders   ( MOST IMPORETANT PART OF STEP )
and see if that helps the issue

tunned i fix it pm me too tell u how fix it 

SEE  'STILL CRASHING LIKE CRAZY' IN GENERAL DISCUSSION IN THIS FORUM.