How can I work with Kotonoha Akane & Aoi in Synthesizer V web editor?

I have recently discovered the Synthesizer V web editor. I have found out that the latest version has Saki, Kotonoha Akane & Aoi voicebanks, but I am only able to work with Saki so far. I don’t know how I can select and work with Kotonoha Akane & Aoi. Or if its even possible.

「いいね!」 1

The voicebank of Web Synthesizer V was placed on a different page:
Synthesizer V Saki|製品情報|AHS(AH-Software) (ah-soft.com)
Synthesizer V 琴葉 茜・葵|製品情報|AHS(AH-Software) (ah-soft.com)

If possible, it is recommended to use the Lite version of the voicebanks with fewer feature limitations and higher synthetic sound quality.
Synthesizer V Studio Basic 及び 各種Synthesizer V Lite版ダウンロード|製品情報|AHS(AH-Software) (ah-soft.com)
Free Download For Lite Version Voices

(Translate with a translator)

Thank you! Just one more question, will the trial ever expire or not?

Synthesizer V Studio is no expiration time, you can use it all the time.
(Translate with a translator)

While I understand the push to use the more powerful executable, I see potential with this web version to act as a gateway for younger users. Chromebooks (essentially, low-power laptops with only Chrome installed) are rather popular with the schools here.