What OS are you using? What version of the client are you using (32-bit or 64-bit) ?
We got a guide here: https://pokemonrevolution.net/forum/viewtopic.php?f=16&t=31177, maybe it helps you out.
Let me know if it worked.
hey dude it crashes again
Unity Player [version: Unity 5.3.5p8_4ff20829e874]
PRO32_95_4.exe caused an Access Violation (0xc0000005)
in module PRO32_95_4.exe at 0023:011975ca.
Error occurred at 2016-07-20_203620.
D:\New folder (3)\PRO32_95_4.exe, run by blank.
71% memory in use.
1980 MB physical memory [563 MB free].
3960 MB paging file [2087 MB free].
0 MB user address space [3753 MB free].
Read from location 0000001c caused an access violation.