Help with the 2023 version!!!

Hi, we have just downloaded the 2023 trial version into a Windows 10 computer, as it wouldn't download on our Mac Catalina anymore (sad that everything evolves so rapidly that even good machines become obsolete!). But we came across a problem, which we didn't have with the 2018 version, but also found on the 2022 trial version, which is: it won't download the sound in MTS, only in MP4, making us convert all the files, which is a bother. Is there anyone who knows why this is? How come newer versions in some respects are worse than the older ones? And it is almost impossible to contact the customer service, so this is costing me a lot of time. If the 2018 version was nott so bad, we would have just gone on using it, but it was dire, so many problems..... 

Sadly enough the two newer versions seem to have less transitions and less effects than the 2018 version, something I am not at all happy about! Not sure whether I will buy one of these or whether will just look elsewhere! We have the Final Cut Pro, which my husband loves, but which is far too complicated for a beginner like me!