I'm also having issues with client unable to export data from his site, and I am also unable to export using either IE or Firefox. Permissions are set to 777 on the wp-content/uploads/gravity_forms folder and its subfolders so that's OK.
On your first attempt to download using IE, the browser pops up the yellow warning bar, asking if you want to allow download. When you click yes, nothing happens, you are returned to the Gravity Forms download UI screen.
On your second attempt to click to download, you get an Internet Explorer error box with "unable to download download.php from applecaredoctors.com. Unable to open this Internet site. The requested site is either unavailable or cannot be found."
However, when you look in the wp-content/uploads/gravity_forms folder you do find that it created a CSV on your server in that folder. This doesn't help my client, who is expecting to be able to save the CSV on his local PC.
With Firefox, when you click Export button, the export animated icon runs at screen bottom and it stays on the export screen, no other messages or popups, and a copy of the CSV is created in the uploads/gravity_forms folder. No opportunity to save the file to your local PC is presented.
From the sound of the "unable to download download.php" error in IE, this might be an issue where code can't find a path? We have WordPress installed in a folder off the root, and this site is hosted on GoDaddy. We already experienced an issue with GF unable to find .js files on GoDaddy hosting earlier that prevented conditional form fields from working (which was fixed in the last upgrade of Gravity Forms thanks to Carl) so this may be a similar situation with the export code unable to find a path?
I've spent some time debugging this, no luck yet.
Posted 6 years ago on Saturday February 27, 2010 | Permalink