Just some corrections:
Step 1-. I wrote in the Butterfly "New Build" post that you needed to use the butterfly.sqlite that comes inside the rar. Otherwise, it won't work.
Step 2-. I'm not sure if that does something actually, but I'm ok with this.
Step 3-. I don't really know if that made any change for what you needed, but I'm ok with this too lol
Step 4-. Unnecessary. All you need to know is any e-Amusement card starts with E004 and 12 more numbers or A-to-F characters so you can always use your old card0.txt 'cause it's only 16 digits/characters for your "eA ID".
Step 5 & 6-. Totally necessary if it's your first run. If you wanna play the Dan courses or Nonstop courses, you have to change from Free Play to Coin Mode.
Step 7-. Unnecessary. card0.txt only hold your "Card ID". if you're using a new database, then it doesn't matter what card you're using. If you're using an old one, you didn't read sh*t in this post and you deserve to not run it haha.
Step 8 & 9-. Totally fine if you don't wanna be running a bat file everytime you wanna play.
Step 10-. Please, @vinson77, share with us what antivirus are you using. I never had any problem with NOD32 and Avast (In another laptop). Never knew of an antivirus that blocked writing to a local database from a local client.
Step 11 & 12-. Most important thing around if you wanna play this data lol.
Greetings and I'm glad that it's working