1. Right click the thumbnail of a PDF file, and then select "Properties":
2. In the PDF file's Properties dialog box, click on "Change":
3. Choose "Adobe Acrobat DC" and click "OK":
4. In the Properties dialog box, click "OK" to save the change:
1. Right click the thumbnail of a PDF file, and then select "Properties":
2. In the PDF file's Properties dialog box, click on "Change":
3. Choose "Adobe Acrobat DC" and click "OK":
4. In the Properties dialog box, click "OK" to save the change: