I tried the 3.5b. No change:
Phoenix Miner 3.5b Windows/msvc - Release build
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Available GPUs for mining:
GPU1: GeForce GTX 1070 (pcie 2), CUDA cap. 6.1, 8 GB VRAM, 15 CUs
GPU2: GeForce GTX 1070 (pcie 3), CUDA cap. 6.1, 8 GB VRAM, 15 CUs
GPU3: GeForce GTX 1070 (pcie 5), CUDA cap. 6.1, 8 GB VRAM, 15 CUs
GPU4: GeForce GTX 1070 (pcie 7), CUDA cap. 6.1, 8 GB VRAM, 15 CUs
GPU5: GeForce GTX 1070 (pcie 8), CUDA cap. 6.1, 8 GB VRAM, 15 CUs
GPU6: GeForce GTX 1070 (pcie 9), CUDA cap. 6.1, 8 GB VRAM, 15 CUs
FATAL ERROR: Debugger detected