I use only the latest 3.6 version now, in Portable form. I would encourage others to update.
BTW: How to update to MusicBee Portable 3.6, in the current absence of complete 3.6 install packages:
1. If you aren't already using the Portable version of MB 3.5, get it and install using the instructions here:
https://getmusicbee.com/forum/index.php?topic=40059.02 Because of various file updates contained within (BASS libraries, etc.) that are not yet present in the 3.6 patch file referred to in step #3, download the latest 3.5 update patch at
https://getmusicbee.com/patches/MusicBee35_Patched.zip and extract it into your Portable version's main folder, allowing it to overwrite any existing files of the same name.
3. Now download the MusicBee 3.6 patch from
https://getmusicbee.com/patches/MusicBee36_Patched.zip , and extract it into your Portable folder, allowing it to overwrite existing files of the same name.
4. After completing step #3, you are now running the latest version of MusicBee 3.6 Portable.
P.S. I added an edit to the main Portable instructions at the link in step #1, referring to this post. If and when Steven posts official 3.6 Portable full downloads, both will be edited accordingly.