downeaster59, thanks a lot!
Everything seems to be great. I guess, I will be ordering T63 before the promotional price period ends. Their ploy works with me

I think it will eventually appear rebranded as an InkBook @ inkbook.eu but who knows when.
I am a bit surprised that hidden folders are not visible from CR, but that is a different CR version - they are visible in linux CR that comes as a part of the chess package. I should have tested on my T2 first before asking you...
However, if the indexing needs to be explicitly initiated - that does not matter as I will not do it.
So far my experience with other devices was as follows:
after I upload some books (I guess they call it sideloading) and disconnect the usb cable from PC, the device stalls for a long time while it is indexing books or checking what changed in the library, etc.
I understood that does not happen with T63.
So CR is working fine. But I am afraid there is no dictionary software that would support the buttons. CR can be integrated with dictionaries, but all the dictionaries I ever tried require scrolling. I am using GoldenDict as the best of the bad. Maybe something changed recently, though.