so, I attempted to update and according to the app I am up to date.
I didn't happen to see a manual update process on the docs site, so I updated the .php manually by copying your current file and getting the file to the server by WinSCP.
After doing so it appeared to correctly pull the invoice URL but noticed that I had the https:// in my config base url in general settings. So I tried to correct that and it lands on a white page in the /post.php page. It doesn't appear to be loading but when going back to the general settings it has not saved.
config.php is defined as flow.domain.com
config base url in general settings is set to https://flow.domain.com
Invoice URL returns: https://https//flow.domain.com// - Notice the missing colon which is not missing in the general settings page, and the double forward slash at the end of the url.
Current DB Version: 0.1.5
404 error on blank page: (maybe unrelated)
DevTools failed to load source map: Could not load content for https://flow.domain.com/plugins/toastr/toastr.js.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE
DevTools failed to load source map: Could not load content for https://flow.domain.com/plugins/bootstrap/js/bootstrap.bundle.min.js.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE
DevTools failed to load source map: Could not load content for https://flow.domain.com/plugins/moment/moment.min.js.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE
DevTools failed to load source map: Could not load content for https://flow.domain.com/dist/js/adminlte.min.js.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE
DevTools failed to load source map: Could not load content for https://flow.domain.com/dist/css/adminlte.min.css.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE