Now 3 steps only to start use "Bad-Company-2-Map-Editor-master by Powback":
1. Download and extract folder "Bad-Company-2-Map-Editor-master" to your HDD.
2. Download Unity
3. Start Unity Editor and open exist project: Bad-Company-2-Map-Editor-master (what you download)
How:
https://youtu.be/zp3jJkivDPY
https://youtu.be/CbyEzifnnko
Tested on win7 x64, Unity 5.6.0p4 (64-bit)
All credits to Powback, I only delete not used files.(lot of time in modding was not spended in vain


Download Link:
https://mega.nz/#!Wig1iaYC!4K8MOs1TuKV3 ... cRwJV4BQxo