PDF documents will not open in Acrobat DC

[UJN]

I am using Acrobat DC on MacBook OS High Sierra. Acrobat DC will start, but documents will not open anymore. Unistall / reinstall doesn't help. Any ideas?

[Question moved to the Installing, Updating, & Subscribing to Acrobat forum. -Mod.]

[try67 · Accepted solution]

After opening a file go to the Window menu of Acrobat and see if it appears there. If so, click on Tile - Vertically / Horizontally and it should appear.