Synapse 2 does not open!!!

Hello guys,

First, I use Synapse 2 cause i have a Deathadder classic which only works with Synapse 2 and not 3.

he problem is that Synapse 2 was working normally, until i installed an app for my work and that app requires to add some dll files which was conflicting with Razer dll files i think. So i changed some dll files related to Synapse in order to install my work app and from that time, Synapse app doesn't start, i see the app in the bottom right corner next to the audio thing but when i click open nothing happens.... I tried many things, Complete uninstall and re-install, even deleted my work app (which i don't need it anymore), and re-installed Synapse but still have the same problem!

Can someone help me please? I also forgot the name of dll files i changed so if someone can give a help at least with the name of all dll files related to Synapse 2 (including the ones in sys32/64 i would appreciate that!

Thanks a lot !
I m running a Windows 10 ver 1903 64 bit.