Hi, can you try right mouse clicking on the PDF file you exported, then select any of the other available programs to open the file. Seems to be specific to Microsoft Edge, we are having trouble opening any PDF file with Microsoft Edge, even if it was generated by another program, not CoinManage...
we found a page that may be helpful to users with this problem it is at:
https://www.intowindows.com/fix-edge-not-opening-pdf-files-in-windows-10/