If you have Docker installed, there is an easy way to download it by docker:
download all:
docker run -v $(pwd)/issues:/app/issues/ joergi/mag-pi-downloader
download specific range first to last (example: from 1 to 2
docker run -v $(pwd)/issues:/app/issues/ -u $(id -u):$(id -g) magpidownloader -f 1 -l 2
docker run -v $(pwd)/issues:/app/issues/ joergi/mag-pi-downloader -f 1 -l 2
(unfortunately the issues folder is root, so you have to change it to your user)
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docker run -v $(pwd)/issues:/app/issues/ joergi/mag-pi-downloader -f 1 -l 2
sudo chown $USER:$USER -R issues/