Just upgraded via Go 4, no issues and took about 20 mins.
It has wiped some but not all settings. Specific ones to watch out for (i) it reset my RTH altitude to 30m, (ii) turned off some OA in tap to fly and active track and (iii) reset my control sensitivities.
It has wiped some but not all settings. Specific ones to watch out for (i) it reset my RTH altitude to 30m, (ii) turned off some OA in tap to fly and active track and (iii) reset my control sensitivities.