Hello, I've recently purchased and eBook from a South African shop called Take a Lot. They made me download Adobe Digital Editions in order to read it. I did successfully. Then uploaded the .acsm file of the book. At the beginning everything was fine but lately it is painfully slow. Something is wrong. Scrolling down a paragraph takes forever. I contacted Take a Lot but there is no reply yet. I went to the Apple store (I use a MacBook Air with 10.14.3 Mojave OS) but they said they don't know Digital Editions and couldn't help. Please advise. Thanks.