Unfortunately, there are no setting to lower the resolution at the moment. Do you mind giving me your specs?
Yeah you really shouldn't be having any issues. I've tested it on my Laptop with these specs and it worked just fine.
Intel Core I7 8750H
16 GB RAM
Nvidia GTX 1060 6 GB
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My Desktop specs are the following.
Intel Core I7 7700k
32 GB RAM
Nvidia GTX 1017TI 8 GB
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If I had to guess what the issue was, I would say it's the RX 560.