After updating to Lollipop on my Nexus 5, it restored all of my apps except for about 10. One of them is a widget that I use everyday called Simple Calendar Widget by MYCOLORSCREEN. When trying to download the app, it gives me the message "Unknown error code during application install: -505". It seems to download fine, but the message pops up during the install process. Anybody know about this issue or experiencing the same thing if you try to download this application? I also tried downloading the apk file online but that also fails to install. I can't find any info regarding this issue. Thanks.