I tried again and error is still there. What I did:
1 - Desactivated extension.
2 - Removed datas.
3 - Deleted extension in host and uploaded a fresh copy.
4 - Tried to activate. I got the same error: "The config setting "version_cookiepolicy" unexpectedly does not exist."
5 - Tried to activate again. Same error.
6 - Tried to activate again. Same error.
7 - Removed datas.
After that, I created a new line in phpbb_config table with this inside:
config_value: 1.1.3 <=== This time I tried with 1.1.3
8 - Tried to activate again. Same error.
9 - Tried to activate again. WORKED!
10 - Everything is working fine. If I desactivate extension and remove datas, I have to insert the line in database again and repeat steps 8 and 9.
So, I may repeat this error as many times as I want. Its clear there is a bug with "version_cookiepolicy" variable. It loks like extension are not able to create this line in database (but is able to delete it).
@RMcGirr83: Did you get Portuguese-Brazil translation here? https://www.sendspace.com/file/6wwzy0
I have created another new forum just to install and try this extension. It worked without problems but variable "version_cookiepolicy" was created as "1.1.0". Why?
Sorry for my bad english. I'm from USA.