[SOLVED] My ATO->CSS Inserts input box shrunk to only 1 row

Doing a test-site on my local harddrive with Atahualpa v3.4.2 at the moment.

My "ATO-->CSS Inserts" input box shrunk to only 1 row. Similarly, the "Layout Container Style" also shrunk to 1 row. I wish to make modifications but now I can't see the code that I put in previously.

I have reloaded the Atahualpa 3.4.2 wordpress files but it didn't help.