I find https://vizard.ai/ 's user interface for editing transcripts much easier to use than Flowjin (although I still love Flowjin overall for being able to identify distinct speakers).

In Flowjin's UI, you see the text of the transcript, and if you want to delete a word, you select the word with your mouse cursor, click on the word, wait for the pop up menu to appear, then click "Clear Highlight".

In Vizard's UI, you have a vertical bar that acts as a cursor in a text field (like a traditional word processor). The cursor can only appear between words (as opposed to in a traditional word processor where it can appear within a word, but between letters). Pressing the backspace key "deletes" (clears the highlight) of the word to the left of the cursor. Pressing the delete key clears the highlight of the word to the right of the cursor. The arrow keys can be used to move the cursor around the transcript.

I find Vizard's UI lets me make edits to the transcript much faster than Flowjin's UI.