Since i installed Ableton 10 Synplant isnt working (no sound is coming from it.

How is that fixable?

Does it look like it is responding to MIDI at all? One of the most common reasons why Synplant isn't producing sound is that it is configured for the wrong MIDI input channel. See this thread: https://soniccharge.com/forum/topic/153-synplant-not-receiving-midi

However there seem to be some rare cases where Synplant is silent for no apparent reason. Here is a thread where we try to get to the bottom of it: http://soniccharge.com/forum/topic/779-synplant-not-giving-sound-on-ableton . If it is not the MIDI channel that is incorrect, could you perhaps download and test the Ableton project that I uploaded to that thread?