honey wine (mead) hydromel

[alexmat]

Hello everybody. I recently production a batch of mead. it's the first time for me. the raw material was provided to me by a beekeeper friend. the initial gravity was 1090. almost a month has passed and the gravity has settled at 1040 for about 2 weeks. do you think it has finished fermentation? how can i check it? can I try to make a transfer and add more yeast? an advice? thank you