RichFX player and NPVPG004.DLL

I uninstalled old RichFX player from Add/Remove programs(there was just
entry in Add/Remove program list, but was no program itself in Program
files). The confirmation was shown that program was uninstalled.
Uninstallation removed also RichFX folder from C:\Program Files\Common
Files\
Amongst other files there was NPVPG004.DLL in that folder.
I searched for NPVPG004.DLL in registry, and it show a vast quantity of keys
referred to this NPVPG004.DLL,

[HKEY_CLASSES_ROOT\CLSID\{47f591a1-8783-11d2-8343-00a0c945a819}\ToolboxBitma
p32]
@="C:\\PROGRAM FILES\\COMMON FILES\\RICHFX\\NPVPG004.DLL, 1"
etc
Is there other programs that may use this NPVPG004.DLL? Is it safe to
remove all these keys that referred to NPVPG004.DLL?

thanks.