Where can I get the link or place to download the Synapse 4?

Synapse 4 has not released yet, It is planned to release later this year to next year. Sign up for the beta release to get it as soon as possible.

I’ve already signed and it still saying that i need to wait.

Synapse 3 is almost unusable for me and it takes too much resources.  I just bought the Huntsman V3 Pro and I feel like i have half the product.

I would really really like to try Synapse 4,  right now I just uninstalled Synapse 3.