I got this from the FAQ at
http://www.xolox.nl/client/support.html

Q. I get Error message: 'Unhandled exception EConvertError Exception
message:''173446'' is not a valid time' or similar ?
A. You will need to change your regional settings in Windows for the display of time.
Go to Start > Control Panel > Regional Settings > General > 'Time' Tab. (in wXP click on the 'customize' button)
Make sure the AM and PM symbols are set to AM / PM and NOT a.m./p.m. If you already have the regional setting to English / U.S. this is likely not needed.