Found this quote on the BibleWorks website, ordering page, so based on it, sounds like if you had TWOT in BW9, that you would get a free unlock code for BW10:

Databases Removed from BibleWorks 10

Occasionally items are removed from BibleWorks, either because they have become obsolete or because we were unable to renew licenses at rates that are fair to our users. In challenging economic times all licensors understandably need to maximize income. However, we do not as a rule pass along increases to users. The price of BibleWorks must be kept affordable. This means unfortunately that on occasion some items must be dropped or, in a few cases, turned into extra cost add-ons. Items removed from the BibleWorks base package in BibleWorks 10 are as follows:

  • Theological Wordbook of the Old Testament, Harris, et als
  • Moody Bible Atlas, Beizel
  • CNS Romanian Bible (we will restore this version if certain copyright issues can be resolved)
  • French Jerusalem Bible (FBJ) (we will restore this version if certain copyright issues can be resolved)
  • Afrikaans versions A83 and AFR
  • WHO (Wescott and Hort NT) and SCO (obsoleted by newly proofed texts (WHT and SCR)

If you are upgrading from BibleWorks 9 you can obtain unlock codes for these items (except for WHO and SCO) free of charge. They will not be available to new purchasers of BibleWorks 10.