Download older Firmware versions

Hi,
after further testing with v 1.0.62, v1.0.59 and v1.0.57 firmware with the camera outdoors, 13C, direct sun, low wind, recording 360, 5.7k, 30fps H264 I never managed to record more than 19 minutes before the camera shutsdown due to overheating!
I want to roll back to previous Firmware v1.0.41 with which I never had a single problem in 2 seasons of filming, but I can only find version notes and nowhere to download old firmware anymore.

Where can I get a link to the v1.0.41 firmware?
Thanks in advance.