I know a way:
Fictional example: increasing stamina by 10.
STEP 1
- Backup your fifa.db first.
- Open fifa.db with DB Master.
- Go to 'players' tab and search the stamina column. Order it from the highest value to the lower one.
- If any player has 91 or more stamina, they have to be ironed out, because when you add +10, they will have 101 or more. Give them values under 91. I assume there aren't many players with 90+ stamina, so you can do it manually on DB master.
- Save result.
- Export players.txt (export single table) to your windows desktop.
- Once it has finished exporting, close DB Master. This is important: in step 3 you have you open DB master again, and you could be wondering: why close it now and then opening again? because for some reason you get an error if you don't. At least I get it on my computer.
STEP 2
- Open players.txt in excel.
- Search for any value of 10 anywhere on the table. Copy it (ctrl C)
- Go to the stamina column. Select all values. When highlighted, left click it, and choose 'paste special'. Paste Special will use that valued you copied before to alter your highlighted selection. So in this case select "add", and accept. This will add +10 to every player's stamina.
- Save players.txt and exit
STEP 3
- Open DB master. Go to players tab.
- Import single table (players.txt of course)
- Save the result.
- Play the game.
I hope it helped. And trust me, it doesn't take as long as it may seem.