Hi Vancen,
Which version of Windows do you have?
Also, the easiest method which has worked for most other users with the issue is to install the test of the Adobe creative cloud, because that apparently requires the same DLL as Spriter Pro does.
The other option is trickier and more time consuming, which this:
IMPORTANT: If you try to install Visual Studio 2013 and the installer says you already have a newer version, then you need to uninstall the newer version so that 2013 can successfully install. Windows update will later install the latest version, but you'll keep the DLL Files Spriter needed.
Please install the Visual Studio 2013 C++ runtime. If you are on 32 bit Windows you only need the 32 bit version (x86). If you are on 64 bit Windows, you will need to install both the 32 bit (_x86) and 64 bit versions. http://download.microsoft.com/download/0/5/6/056dcda9-d667-4e27-8001-8a0c6971d6b1/vcredist_x64.exe
The 32 bit version can be found here:http://download.microsoft.com/download/0/5/6/056dcda9-d667-4e27-8001-8a0c6971d6b1/vcredist_x86.exe