Resolved: SourceForge outage is causing download issues (Sep 26, 2017)
There is currently an outage at SourceForge that is causing failed downloads via both the web and via the PortableApps.com Platform. SourceForge is aware of the issue and actively working to fix it. You can follow along on their Twitter feed for updates here: https://twitter.com/sfnet_ops
Symptoms: In the browser, you may see constant redirects when attempting to download or an error page. In the PortableApps.com Platform, you will likely see an error that the downloaded file is invalid.