The latest version uses a different detection algorithm, with this setting no longer available - to change the mode of detection we now need to alter not just one thing. This algorithm is much better in general, so we moved to it.
In this version we keep two possible settings: for re-written and for word-to-word Plagiarism. I will soon post a detailed explanation as to these, but in general: re-written is close to "maximum detection" on the previous scale, "word-to-word" - maximum exactness. These settings are results to extensive tests on big collections of Plagiarized pieces and provided best results we could reach in the recent years.
We are sorry to hear this was so important to you and I will ask our RnD about the possibility to return some manual settings in future.
Force updating to the current version was needed due to some changes on the third side, that made previous version worthless.
P.S. Any other users in need of the manual settings - please inform us either in this topic, or e-mail to our support. The more people need it - the more urgent will be the task.