After 3 days, I was able to download the portable version and try version 6.1.3.2900 and I have to say that it seems to work fine. It had been a long time since I had start-up stability and with this version I have not suffered any crash (Finally!). I still think it takes a long time to load, but once it's loaded, its performance has stabilized: bookmarks, extensions, and theme sync with changes made on other computers.
I do not agree with the forced interruption of the download of certain file extensions (EXE, MDB, etc.). I start from the basis that we are aware of what we download. If I make the mistake of downloading a malicious file, that's my problem. I don't need the browser to restrict or warn me from downloading. It is a useless measure because if I download a ZIP or RAR, it may contain an equally malicious EXE and the download completes normally. Does no one realize that this just causes unnecessary delays? At least include an option for someone who wants their downloads interrupted, but I want freedom. To detect malicious files I already have an antivirus installed.