RealTerm: Serial/TCP Terminal

I’m trying to migrate from TeraTerm to RealTerm (2.0.0.57), because TT
leaves COM1 locked up if you close it without closing a capture file (the
only known recovery being to disable and then re-enable the COM port, with
two reboots).

I find RT to have a similar problem (and no provision for closing the port
explicitly), but have recovered by using the command line:
> realterm FIRST PORT=9 QUIT
This is less messy than TeraTerm, but still untidy.

Please get RealTerm to clean up after itself. Thanks!