forum.ubuntuusers.de/topic/wlan-probleme-mit-acer-v3-371-36m2-und-ubuntu-/
askubuntu.com/questions/613794/wireless-on-acer-aspire-v3-371-very-poor-or-not-working-at-all-what-can-i-do
digitz.org/blog/wifi-issue-on-acer-laptops-running-linux-qualcomm-atheros-device-0042/
Master PDF Editor
code-industry.net/get-masterpdfeditor/ 
smime.p7s
https://code-industry.net/public/master-pdf-editor-4.3.89_qt5.amd64.deb (Version 4 ohne Wasserzeichen)