Hello! So I saw a thread in posted in 2018 by user Swagtown, and I decided I would do a little bit of a repost scenario with clarification and pictures as a step-by-step walkthrough on how to update any client to the current version to play with. WARNING: This may be unsafe, may get you banned, but if you want to play with a client and not wait possibly a week for a release, this tutorial will show you how.
--Precursor: Tools you will need--
-JPEXS Free flash decompiler
-Old client of your choice (I used 059's client)
-Fresh .swf of ROTMG.
--Step 1: Gathering Information--
-After you install JPEXS, open the fresh ROTMG .swf (Named AssembleeGameClientXXXXXXX)
-Open directory trees to "scripts\com\company\assembleegameclient\parameter s\Parameters.as"
-Find "RANDOM1:String" and "RANDOM2:String" values and copy them to somewhere like notepad.
--Step 2: Updating the client--
-Open your client .swf in JPEXS to "scripts\kabam\rotmg\messaging\impl\GameServerConn ectionConcrete.as"
-Find the string "_loc1_.buildVersion_" and change it to the current version by using the "Edit P-Code" button on part 3 of the image below. Current versions are publicly availible on RealmEye.
-Now browse to "scripts\kabam\rotmg\application\impl\ProductionSe tup.as"
-Find the build version as pictured below and set it to the current build version using Edit P-Code as done before.
-Then browse to the same area as shown in step 1 but in your outdated client and change the values of RANDOM1:String and RANDOM2:String to the values you copied earlier.
Now you're done! Save the swf file, maybe as "whateverclient-edit.swf" and open it with Adobe Flash Projector!
Closing Statement: If any update introduces new content, the new content sprites may not appear as you are technically using an older version of the game.
Thank you for reading my tutorial. I hope I could have been some help for those who are impatient and just want to play. Remember to say thanks on the post if it helped any!