Justin,
If you are on a PC or Mac you can edit the prefs.xml file by right clicking and opening in Notepad or equivalent text editor (I’d make a copy before editing it in case your edits mess up the program). Based on the attached picture I believe you can just delete anything between < CALIBRATION > … < /CALIBRATION >
source: HOW_ Calibration - Stryd, Treadmill, Zwift - Google Docs.pdf - Google Drive