Hello,

thank you for the feedback.

Are you running any mods? If so please try to disable them first.

The next thing I would ask you to do is to provide us with the crashdumps.
If you are getting crash with vanilla version (without mods) please try to provide crashdumps created without the mods.

You can get the files by simply reproducing the crash, once the error window appears select Show Details and Prepare Report, once the files are ready, you will have option to Save Report enabled, please use it and save the ZIP file with the report somewhere where you can access it and upload it here.
Or you can look for the crashdumps manually. Crashdump (set of mdmp + rpt + bidmp with same timestamp) files should be located in this directory:
C:\Users\<username>\AppData\Local\Arma 3

Once you have the files in a ZIP, please drag&drop them into the comment box, or (if you encounter any issue with uploading it here) upload them to some free file sharing service (for example Dropbox) and post the link to the files into the comments.

Thank you