Long time ago I was active on this forum. Anyway my old DAP-1360 Rev. B are still running fine as basic AP in a small network. Still going strong after 10 years, I only had to get new AC adapters because the old ones failed.
I recently bought two second hand DAP-1360 units that are Rev C1 and Rev C2 and they both had old firmware. After some research, checking this forum and bouncing around the web I found the information I was looking for. These units are intended as backup if the others fail.
dap-1360_fw_revc_3-08_eu_multi_20170320.zip is the latest firmware and has the DAP-1360C2_FW308b11.bin file in it. I can confirm that this firmware works on both the C1 unit and C2 unit. They only changed the H/W name with the v3.0.7.b04 firmware update. The web interface do show the C2 H/W on the C1 H/W unit on the web page but it seems to work fine. This could be confusing for some people.
If you have these older DAP-1360 H/W C, C1 or C2 units you should be able to update the firmware to v3.0.8.b11 and when update is complete and the unit up and running, do not forget to use the "reset" button and reset the unit. This only needs to be done once and you should have no problems after that.
This product is EOL for some time now but I am posting this information here anyway