As you might know, we've implemented BigCommerce onto our website since Jan, 2018 and got various issue reports about downloading and login. Here's some known solutions listed below:
1) Login issue:
If you can't log in on our website, please clean the cookies first and try again. For how to do it, you may refer to this: https://www.digitaltrends.com/computing/how-to-delete-cookies/
2) Download issue:
Some users reported they couldn't click the dropdown menu to further download installers. This has been fixed after we re-designed the download page.
3) Miscellaneous issues:
Some browsers like IE or Edge may have issues while browsing our website. Please try other browsers like Chome or Safari.
If your issue persists, please write us at https://help.positivegrid.com/hc/en-us/requests/new