I'll assume you mean replace your save file with the one in this thread, because otherwise I wouldn't know
1. Block EAC
2. Start ClaudExtract app
3. Start the game
4. Skip, cinematic, press Space when prompted, ClaudExtract should extract your save data into cloudsave.txt
5. Open that same (yours) cloudsave.txt in save editor:
https://www.mpgh.net/forum/showthread.php?t=1343336
6. Copy your playerUId and paste it somewhere - you'll need it later
7. Replace extracted cloudsave.txt with the downloaded cloudsave.txt from this thread
8. Open downloaded cloudsave.txt in the save editor and paste your playerUId there, save, overwrite
9. Go to ClaudExtract app, press 1 to inject save data, then any key to continue
10. Check your new stuff in the game, don't forget to disable firewall rule and restart the game before playing.