As mentioned above, Acrobat Pro DC closes itself, could you try rebooting the machine once if you haven't already and try launching Acrobat again, does that work?
Also, does Acrobat closes when you trying to launch the application or when trying to open a pdf file?
Is there any error message you are getting? Which operating system you are using - Mac or Windows?
Also, let us know dot version of Acrobat installed on the machine? You may refer to the steps given in this link on how to check the version in Acrobat: Identify the product and its version for Acrobat and Reader DC
Let us know if you need any help.
Sorry for the issue that you are facing while using Adobe Acrobat Reader.
I would request you to kindly share the Crash dumps when Reader Crashes for you.
Here is how you can collect the crash dump :
When Reader Crashes (If you get this error message "Adobe Reader has stopped working") , Can you please share with us the Crash Logs .
For Getting the Crash Logs:
a. When Acrobat Reader Crashes , Open Windows Task Manager
b. -> Got To Processes, There you can see a process "Adobe Acrobat Reader DC" / AcroRd32.exe
c. Right Click on this process and click "Create Dump File"
d. Dump file will be created in the Temp folder of user (as specified on the dialog you get after creating dump files).
e. Save this DMP file on any Cloud Storage and Share the link for that with us on mail at email@example.com
We will try to analyze your issue on priority once you share this information with us.
We acknowledge the issue and Adobe Acrobat and Reader official update (19.008.20074) containing the fix for this issue is now available. This update will be automatically pushed to all existing installations of Acrobat and Reader. If you want, you may also manually trigger the update early by opening the application and going to Help > Check for Updates.
More information about this release is here: 19.008.20074 Optional update, October 08, 2018 — Release Notes for Acrobat DC Products
Please try it out and let us know your feedback.
Thanks for your patience and support!