I took me a while but here we go. Flyblock 2.4!
I personally think the multiple user system is really nice even though it still has some rough edges. I really hope you enjoy it and appriciate any feedback which can help me improve the plugin!

Changelog:

• Added support for multiple users on a Flyblock. Flyblocks can now support up to 14 users! (changeable in config.yml). A user section has been added to the right click GUI which allowes for adding and removing users from the Flyblock as well as transferring ownership to them.
  Users can open the Flyblock GUI's but can't add, remove or transfer ownership. This is only done by the owner.
  
• Added a config option which allows for enabling or disabling transfer of ownership on drop of a Flyblock.
  
  If transfer on drop is disabled:
  Flyblocks can still be picked up by other players but can't be placed unless this player is the owner.
  
  If transfer on drop is enabled:
  Flyblocks can be picked up by other players. The player which places the Flyblock after picking it up will become the owner of the Flyblock. Users added to the Flyblock will be removed once a different person picks it up and places it.
  
  
• Added a way to change the GUI (inventory) name of Flyblock GUI's using the config.yml
• Added a way to change which block (material) is used to represent a Flyblock using the config.yml
  
• Added a way to change the name of Flyblocks inside the shop using the config.yml
• Fixed multiple bugs which prevented level 4 & 5 Flyblocks to be used in certain situations
• Fixed any player being able to open the right click GUI of a Flyblock. now only users and owners are allowed to.
• Fixed a issue where renaming any item in a anvil to the same name as a Flyblock causing errors
• Added support for older model Flyblocks (when users were not implemented) these Flyblocks can still be placed and will be converted to newer models once placed down.
• Added support for Flyblocks with different material types. If for example you changed the config to have a Flyblock be represented by a Emerald block your old Flyblocks which have a different material will automatically get converted once placed.
• Changed the way data was stored and loaded from the files. the fbCounter.yml file has been removed as it was horrible design.
• Fixed a problematic bug where players would sometimes not be allowed to pick up their own Flyblock (I am very sorry for that)
• Changed the design of all GUI's
• Changed the way the plugin logs data to the console to be more in line with standards and easier to separate from other logs.
• Fixed problematic bug where players in creative mode lost the ability to fly after breaking a Flyblock
• Added config validation for (most) new config options
  
  Notice:
  • Older minecraft versions then 1.18 are currently not supported (might work but not tested)
  • All files inside the Flyblock folder need to be deleted in order for this update to work.
    This renders any currently placed down Flyblocks unusable.
  • I bought a second Minecraft account to properly test multiple user functions. I hope this decreases problems in the future.
  • Implementation of the user system required modification of major parts of the plugin. I did my best to test and fix anything I could find. Please report any problems or suggestions. This is highly appreciated.
  • Next on my agenda for this plugin is smoothing out the user system and implementing support for multiple Flyblocks per user.
    
    Thank you for anyone who supports this plugin!
    
    
    
    If you enjoy the plugin a rating would be appreciated.
    For any support, questions or suggestions feel free to contact me on discord.
    
    https://discord.gg/PwE5ZXZshh
    Erikv#4924​