Adobe Digital Editions

Hey there! I converted a .acsm file to PDF using Adobe Digital Editions. Sadly I cannot open the PDF File with Microsoft Edge or Adobe Acrobat Reader. Using de Drawboard PDF App it asks me for a password. But my Adobe ID Password does not match... I have never set another password. Does anyone have a clue on how I can remove the password (I cannot do that in the settings opiton, I tried...) or open the file otherwise? My laptop is authorized to read the files but it always asks for a password...