Autocad 2015 upate to Autocad 2017?

[mclisp]

Good evening to you all
I don't want to lose the configuration with 2015 because it works very well, unfortunately Autodesk forces me to update.
I am upgrading autocad 2015 with Opendcl 8.0.2.0 to Autocad 2017,
How should I proceed? do I install OpenDCL 9?
If I install OpenDCL 9 does 2015 still work?
Thanks
Mclisp

[mclisp]

I have installed OpenDCL 9.0.6.1 and it seems to work
again Autocad 2015 and Autocad 2017
thanks for the work you do
ciao