Has the bug occured in previous versions? If yes, please specify version(s): (This option is optional, and doesn't need research. But in case you know...)
Description of the bug:
If you load in a song that uses a plugin that you currently don't have, it gets added to the list of plugins installed. I don't get a message that asks me if I want to search for it on KVR. Possibly its still in my cache somehow, but I don't use the plugin anymore, so I removed it.
Now, I have closed OpenMPT and reopened, and I get the message that it can't find this plugin, because it was added to the list while the file doesn't exist.
How often does it happen?:
How to reproduce (step by step description):
I guess this has something to do with adding a plugin.
Make a song with the plugin, then move the file itself, then removing it from the list, then load a song that uses that plugin, then close mpt, then reopen.