Just would like to suggest to add options to do validation by:
- date (day and month). For example, every 1st of each month, or every 15th of each month, or every 15th of July, or every 1st of January of each year, or etc.
- number of days after activation. For example, user activated their exe file and every 30 days, or 90, or 360 days, or etc, it does the validation.
Cheers (can mark as solved after you read this).