To replace fimH, FimH, and FIMH with fimH you will need three rows in the table with (or nothing) in the WC column.
It is not necessary to enter N. The process looks for Y.
If the OMIT column has Y then that row is not included in the process.
The only way to remove the Batch Process tab would be to use the Office Ribbon X editor to remove the add-in's ribbon. I would caution against doing so as it may render the process unusable.
If you use it only occasionally, you may find Load Word add-ins for the current session only useful.

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Graham Mayor - MS MVP (Word) (2002-2019)
Visit my web site for more programming tips and ready made processes www.gmayor.com