You're gonna need SW PS4 Max in order to open the Advanced Mode. No HEX editing required.
Working as of the latest patch (tested by Salamanca307).
Step-by-step Guide
» Step 1: open Advanced Mode on Save Wizard
» Step 2: [hide]export the file
» Step 3: [hide]save the file
» Step 4: [hide]double click on the file with the notepad to open it
» Step 5: [hide]change the values you want. Ex. 999. The "Default" is also a value that can be edited and means 0 (zero).
» Step 6: [hide]you can also ctrl F/command F keywords such as "level" or "health"
» Step 7: [hide]change the level to any value you want. You can also edit the damageLevelBonus, attackSpeedLevelBonus, resistanceLevelBonus, armorLevelBonus etc
» Step 8: [hide]then, save and import the file
» Step 9: [hide]check if the values have changed
» Step 10: finally, click on "Apply" and you're done with the modding. Enjoy it :)