Look at Delete Specific Application Saved States from Mac OS X 10.7 Lion Resume. You can force-delete files via Tinker Tool System (well worth the price, IMHO). Launch TTS, click the Files tab and then click the Force Delete tab.
Jon
macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365
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