How to transfer Viber profile from Mac to Mac?

Question

Viber

How to transfer Viber profile from Mac to Mac?
I have been using Viber on a Mac for a long time. Now we are planning to install OS X El Kapitan from scratch, and we need to transfer all messages, photos, contacts, etc. In general, you need to make a full backup of the correspondence so that the next time you install everything back in place.
I tried to just copy the Viber folder from the Applications section, tested it on a virtual system, but it didn’t work, messages and contacts are not restored.
I looked in the profile folder along the path " /Users/ xyz /Library/Caches " , but there are only three files
Cache.db
Cache.db-shm
Cache.db-wal
in which there is nothing important.
QUESTION: Where is the cache of Viber messages and photos stored? How to painlessly transfer correspondence and all messages, including those in groups?
Mac OS X Yosemite 10.10.5.

Answer 1

The structure of Viber is similar to the Win system
/Users/first/Library/Application Support/ViberPC/7919******/
correspondence viber.db
/Users/first/Documents/ViberDownloads - attachments here
 Also, first activate viber on the new system, then closing the viber we slip this file.