I have a newly installed pfsense 2.3.2-release-p1, now I have the package openvpn-client-export 1.3.11 Installed but under VPN / OpenVPN / Client Export Utility the clients are not displayed for download.
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The fix is, click save as default on the client export tab page.
Although looking at your screenshot, I don't see that button. Do you have users set up?
There is a 1.3.12 update that fixes this.