(click ...Read More on the bottom right to read all the changes).
Please read the update notes carefully before opening a support request, thanks!

resourcepack:
- regenerated precompiled pack (delete the attribute "url" (under "external-host") in config.yml to update it to the new URL. (for who is still using the default pack).

ide:
- updated the online IDE to autosuggest the new stuff

config changes:
- new option in config.yml disable-REAL_NOTE-behaviour__DISABLE_AT_YOUR_OWN_RISK
- de.yml translation for categories, thanks to Jonas L. | Minecoll_YT
- changed all my default custom blocks from REAL to REAL_NOTE, changed their material to PAPER and set their break_particles_material attribute to the old material base value (will only affect new customers, you can keep the blocks as REAL to avoid problems)
- new option in config.yml fix_transparent_noteblocks__disable-for-more-performance

new features:
- new custom blocks type: REAL_NOTE
- new custom blocks type: FIRE
- now custom blocks support items (non placeable material) as base material. This avoids "double placing" animation which some users didn't like https://github.com/PluginBugs/Issues-ItemsAdder/issues/644
- added new option to specify the vanilla material or custom item to be used as break particle for the custom blocks: break_particles_material instead of using break_particles (which accepts ITEM/BLOCK only). This is useful to specify break particles of blocks that use a non-placeable item as base (for example PAPER).
- added a new command to cleanup unused block IDs: /iacleancache
- new permission for /iatexture all " ia.user.iatexture.all"

api changes:
- now CustomBlock implements CustomStack
- now you can get a CustomBlock instance using CustomBlock.byItemStack or CustomBlock.getInstance(namespacedId) and then do your things. This allows to do caching if you want to place multiple copies of the same block
- now you can get Bukkit BlockData from a CustomBlock using CustomBlock.generateBlockData()
- CustomBlock.remove() method will also set the block to AIR, other than removing it from IA region file
- now you can drop custom items using the customStack.drop(location) method
- fixed CustomMob.spawn method returning null exc if mob doesn't exists

optimizations:
- optimized chat packets: now ignoring actionbar messages and async replace emojis https://github.com/PluginBugs/Issues-ItemsAdder/issues/728

fixes:
- fixed pl.yml language, thanks to ALEX.ithymia
- fixed a problem with block removal causing possible duplication glitches and bad stuff. It's adviced to update. https://github.com/PluginBugs/Issues-ItemsAdder/issues/597
- removed unused old code
- fixed trade_machine default item amount 0 and not 1
- fixed near furnitures trade_machine opens other near furniture trade_machine GUI https://github.com/PluginBugs/Issues-ItemsAdder/issues/713
- now items will respect disappear_when_broken attribute (under durability section) on the return_items decrement_durability of crafting recipes
- now /iatexture works fine when the url is set to my default precompiled resourcepack
- now removed block IDs from cache files (real_blocks_ids_cache, real_blocks_note_ids_cache, real_transparent_blocks_ids_cache) can be used again instead of being permanently locked
- now you'll get a proper error if you use a not existing %img_XXX% placeholder (basically it will print XXX_NOT_FOUND)
- fixed font images counter bugged after /iareload or /iazip
- fixed replace_block not respecting block "from"
- fixed attack damage and speed shown dispite the HIDE_ATTRIBUTE flag
- fixed can't get mushroom blocks using tools with silk touch enchant https://github.com/PluginBugs/Issues-ItemsAdder/issues/730
- fixed Coals nuggets usable in beacons https://github.com/PluginBugs/Issues-ItemsAdder/issues/719
- fixed Custom blocks are not protected, essentialsx and similar https://github.com/PluginBugs/Issues-ItemsAdder/issues/720
- fixed exp not dropping from the center of custom blocks https://github.com/PluginBugs/Issues-ItemsAdder/issues/688
- better error when fixed_glitched_blocks.nbt is corrupted
- probably fixed problems with vehicles and furnitures where the play dismounts the entity but server still thinks it's on the entity, this should be the cause of the chat/kick problems
- fixed worldguard chairs flags not working sometimes