Versions 7.6 and 8.5 are older but have more forgiving licensing (some used hardware dongles). If you genuinely own a license for version 10, some users ethically download version 8.5 (which is widely considered abandonware) because they purchased a license to the software suite, not just the version number.
If you are locked out or cannot find your credentials, the following steps are standard for the FlexiSign 10 environment: Check the Hardware Dongle Flexisign Pro 10 Password
or your authorized dealer. It is typically tied to the serial number of your hardware key (dongle). Hardware Key (Dongle) Versions 7