[Plugin: WP-Filebase Download Manager] Monthly Limit Not Working

Everything works fine when I use the default limit values under ‘settings—limits’, but when I change the monthly traffic limit to 2 GiB, I immediately get the “Traffic limit exceeded! Please try again later” error, no matter which file I try to download. All of my files are 100 MB and under.

Any ideas on how to get the limits working?

https://www.ads-software.com/extend/plugins/wp-filebase/