Hello,
Thank you for contacting.
I just found a screenshot of Spire.License.dll in your attachment. Sorry that we can not tell you the accurate version information only based on the information of Spire.License.dll. Anyway, you must were using our older version. I suggest you download our latest version
Spire.Doc Pack(hot fix) Version:7.3.10, since all fixes and new features are included in our latest version. Besides, we have several different types of license subscriptions for Spire.Doc in order to conform our customers’requirements. Please check their difference and price details from the below link, and purchase a suitable license subscription based on your own situation:
https://www.e-iceblue.com/Buy/Spire.Doc.htmlHow to choose a license subscription:
https://www.e-iceblue.com/Misc/purchase-policies.htmlAfter you finished the payment, the license file will be sent to you via email asap. If there is any question, welcome to write back.
Sincerely,
Lisa
E-iceblue support team