Need to download a playmaker version compatible with unity version 5.6.7f1

[ricard2798]

I am working with a very old sdk, and would like to download a version of playmaker that works with unity 5.6.7f1.  When I download it from the asset store, it shows that its not compatible with my unity version. 
I read that members of the beta group have access to older versions.  How can I gain access to this beta group?
Thanks in advance

[djaydino]

Hi.
You can message me your e-mail / invoice and I can forward it to Alex

[ricard2798]

message sent

[djaydino]

Hi.
I have mailed it to Alex.

[ricard2798]

thanks