Of the best plugins out there, however it seems that it is not well cracked, I imagine it will be difficult. Exactly every 50 minutes (in my case) the plugin shuts down, you should see a license check schedule or something like that surely.
12.08 13:55:20 [Server] WARN Loaded class org.apache.commons.io.FileUtils from PlugMan v2.1.7 which is not a depend, softdepend or loadbefore of this plugin.
12.08 13:55:21 [Server] INFO Found resourcepack folder: /plugins/ItemsAdder/data/resource_pack
12.08 13:55:21 [Server] ERROR Plugin ItemsAdder v2.0.41 has failed to register events for class dev.lone.itemsadder.e.e.c.b.a because dev/lone/LoneLibs/armorequip/ArmorEquipEvent does not exist.
12.08 13:55:21 [Server] ERROR Error occurred while enabling ItemsAdder v2.0.41 (Is it up to date?)
[08:27:38] [Craft Scheduler Thread - 2/INFO]: [ItemsAdder] Disabling ItemsAdder v2.0.22
[08:27:38] [Craft Scheduler Thread - 2/ERROR]: Error occurred (in the plugin loader) while disabling ItemsAdder v2.0.22 (Is it up to date?)
java.lang.IllegalStateException: PluginDisableEvent cannot be triggered asynchronously from another thread.
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:572) ~[spigot-1.15.2.jar:git-Spigot-2f5d615-d07a78b]
at org.bukkit.plugin.java.JavaPluginLoader.disablePlugin(JavaPluginLoader.java:370) ~[spigot-1.15.2.jar:git-Spigot-2f5d615-d07a78b]
at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:501) ~[spigot-1.15.2.jar:git-Spigot-2f5d615-d07a78b]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_211]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_211]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_211]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_211]
at dev.lone.itemsadder.b.d.z(SourceFile:420) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_211]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_211]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_211]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_211]
at dev.lone.itemsadder.b.d.f(SourceFile:261) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_211]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_211]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_211]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_211]
at dev.lone.itemsadder.b.d.a(SourceFile:63) ~[?:?]
at dev.lone.itemsadder.b.d.a(SourceFile:33) ~[?:?]
at dev.lone.itemsadder.f.a.<init>(SourceFile:50) ~[?:?]
at dev.lone.itemsadder.d.b.a(SourceFile:1026) ~[?:?]
at org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftTask.run(CraftTask.java:83) [spigot-1.15.2.jar:git-Spigot-2f5d615-d07a78b]
at org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:54) [spigot-1.15.2.jar:git-Spigot-2f5d615-d07a78b]
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_211]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_211]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_211]
[08:27:38] [Craft Scheduler Thread - 2/ERROR]: Error occurred (in the plugin loader) while unregistering services for ItemsAdder v2.0.22 (Is it up to date?)
java.lang.IllegalStateException: ServiceUnregisterEvent cannot be triggered asynchronously from another thread.
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:572) ~[spigot-1.15.2.jar:git-Spigot-2f5d615-d07a78b]
at org.bukkit.plugin.SimpleServicesManager.unregisterAll(SimpleServicesManager.java:100) ~[spigot-1.15.2.jar:git-Spigot-2f5d615-d07a78b]
at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:513) ~[spigot-1.15.2.jar:git-Spigot-2f5d615-d07a78b]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_211]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_211]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_211]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_211]
at dev.lone.itemsadder.b.d.z(SourceFile:420) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_211]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_211]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_211]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_211]
at dev.lone.itemsadder.b.d.f(SourceFile:261) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_211]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_211]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_211]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_211]
at dev.lone.itemsadder.b.d.a(SourceFile:63) ~[?:?]
at dev.lone.itemsadder.b.d.a(SourceFile:33) ~[?:?]
at dev.lone.itemsadder.f.a.<init>(SourceFile:50) ~[?:?]
at dev.lone.itemsadder.d.b.a(SourceFile:1026) ~[?:?]
at org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftTask.run(CraftTask.java:83) [spigot-1.15.2.jar:git-Spigot-2f5d615-d07a78b]
at org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:54) [spigot-1.15.2.jar:git-Spigot-2f5d615-d07a78b]
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_211]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_211]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_211]