Hey,
I'm sorry to hear you have issues with PlugManX.
Please give me some more information via dm or Discord (
https://discord.gg/dBhfCzdZxq ) so I can help you.
Normally your server can't keep crashing just because of PlugManX, normally this is a configuration issue of the restarted plugin.
I'd be glad to help you. Just contact me personally and I'll resolve the issue with you