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The following are the currently available versions.
| Version 1.0 | This is the original OPVR engine. This works only in Chrome browsers. Selection of locale and saving of dictation audio are not available. |
| Version 2 .0 (current default) | This is the currently recommended version of the VR engine. This works in Chrome, Firefox, and Edge. Users may select their locale (US English, UK english, and others). Additionally, the "locale" and "store dictation audio" features are available. |
Version 3 .0 (preview) | This is a preview release of Version 3.0 of the OPVR engine, available for use now. |
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