What happened to SQL Turbo (Imceda Software)

Our company has used a long time Imceda product - SQL Turbo

Search speed is amazing. no analogues.
At one point, they took and closed the product.
I wrote to the caliper, no one knows what the problem is.
There are suggestions that Microsoft bought the technology and included it in the new Search Engine Server

There are just very few alternatives ... and a shame
')
Is there a living soul that used this product and found an alternative?

PS:
Yandex server does not channel (since there is only a free version, it searches only for files)