Hi Philip5E57,
Thank you for reaching out, and sorry about the trouble caused.
Please try the troubleshooting steps suggested in the following help document: https://adobe.ly/4pJ90c7.
Could you please confirm if you try opening PDFs by double-clicking files? If yes, try launching Acrobat first and try to open a PDF from the Menu > Open. Check if that works.
If the issue persists, please follow the steps outlined here to collect the crash logs: https://adobe.ly/3KE9xgz. You can upload logs to any Cloud Drive (e.g., OneDrive, Google Drive, Dropbox).
Let us know if you need any help.
Thanks,
Meenakshi
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