Maybe not the response you wished for, but the most basic recommendation:
Get ar real file sharing client.mIRC is
not suchlike. mIRC is in fact a superb
chat client.
...I'll never understand why folks prefer to copy-paste metadata from their browser to a dedicated chat client that is just
capable of file transfer - as a secondary feature - while there's a lot of programs designed
specifically for easy sharing (e.g. p2p-clients with clever protocols, embedded DHT-based search, comprehensive settings, ...)
In analogy to this: some dedicated file sharing apps feature some simple kind of embedded IRC client - but you'll hardly install these apps for chat as your primary purpose.
