Use the Hyperlinks panel, of course.
If you are locking up, have you considered some trouble-shooting like trashing/resetting preferences?
This is not the most efficient means but as your other options seem closed to you, try this.
- Click the text frame and then click the Edit menu.
- Find Edit in Story Editor and click that. Your document will appear in the Story Editor with each line tagged. Those lines/words/phrases with the link arrows (look like houses tipped on their sides) are your hyperlinks.
- Copy the text within the arrows and paste it outside the arrows.
- Highlight the first arrow and as much text as you can. This can be trickier than it sounds.
- Hit Delete. Once the arrows are gone, so is the hyperlink.
- When finished, exit the Story Editor.
- If you have more than one story in your document, you will have to do this to each one.
- Also, if you have your hyperlink text marked with a Character Style you may have to remove those using the standard InDesign tool ribbon.
Hope this helps. Cheers!
This may not help you now, but if the document is in MS Word before you bring it into InDesign:
1. Cmd/Ctrl + A Select All
2. Cmd/Ctrl + 6 Remove all Hyperlinks