Try to delete these 2 files: in the sgminer folders (nicehash miner)
amd_opencl32.dll
amdocl.dll
it should detect them.
Hey! That worked. I can now see the card on nicehash miner. But now when I try to benchmark I get a BSOD and a frowny face

(gotta love windows 10). The error says SYSTEM_SERVICE_EXCEPTION (atikmdag.sys).
Go inside the bin folder and start sgminer manually without the nice hash app (runme.bat or something). See if that works
There are 4 sgminer folders. I tried the runme.bat located in the sgminer-5-2-1-general folder and it did the same thing. BSOD atikmdag.sys just after it showed version info.
I don't know if this helps any but I did sgminer.exe -n and got this:
[00:04:08] CL Platform vendor: Advanced Micro Devices, Inc.
[00:04:08] CL Platform name: AMD Accelerated Parallel Processing
[00:04:08] CL Platform version: OpenCL 2.0 AMD-APP (1912.5)
[00:04:08] Platform devices: 1
[00:04:08] 0 Tonga
[00:04:08] Number of ADL devices: 1
[00:04:08] ATI ADL Overdrive5 API found.
[00:04:08] ATI ADL Overdrive6 API found.
[00:04:08] Found 6 logical ADL adapters
[00:04:08] ADL index 0, id -2140028864 - BIOS partno.: 113-2E3083U-X4J, version: 015.047.0
00.012, date: 2015/09/14 05:55
[00:04:08] GPU 0 assigned: iAdapterIndex:0 iPresent:1 strUDID:PCI_VEN_1002&DEV_6939&SUBSYS
_E308174B&REV_F1_4&2EB3824&0&0018A iBusNumber:2 iDeviceNumber:0 iFunctionNumber:0 iVendorI
D:1002 name:AMD Radeon (TM) R9 380 Series
[00:04:08] ADL index 1, id -2140028864 - BIOS partno.: 113-2E3083U-X4J, version: 015.047.0
00.012, date: 2015/09/14 05:55
[00:04:08] ADL index 2, id -2140028864 - BIOS partno.: 113-2E3083U-X4J, version: 015.047.0
00.012, date: 2015/09/14 05:55
[00:04:08] ADL index 3, id -2140028864 - BIOS partno.: 113-2E3083U-X4J, version: 015.047.0
00.012, date: 2015/09/14 05:55
[00:04:08] ADL index 4, id -2140028864 - BIOS partno.: 113-2E3083U-X4J, version: 015.047.0
00.012, date: 2015/09/14 05:55
[00:04:08] ADL index 5, id -2140028864 - BIOS partno.: 113-2E3083U-X4J, version: 015.047.0
00.012, date: 2015/09/14 05:55
[00:04:08] GPU 0 AMD Radeon (TM) R9 380 Series hardware monitoring enabled
[00:04:08] ADL GPU 0 is Adapter index 0 and maps to adapter id -2140028864
[00:04:08] GPU 0 BIOS partno.: 113-2E3083U-X4J, version: 015.047.000.012, date: 2015/09/14
05:55
[00:04:08] Failed to ADL_Overdrive5_FanSpeed_Get for default value
[00:04:08] 1 GPU devices max detected