Downloaded portable (*.zip) version of v3.21.01. I have been using v3.08.01 for quite some time. Noticed a couple of issues:
1) Settings for Highlighting Rectangle and Text Object not saved between reboots. This was an issue for me in v3.08.01, so I don't think it's related to any recent changes. Settings are saved within a given session, and also saved if I exit and restart SCC, just not saved between reboots of Windows.
2) Filename Template %quickfield% Screenshot - %customdate% %num%, where %customdate% is set to: %Y_%m%d. The first capture does not contain the %num% value in the filename, shows blank (e.g. Screenshot - 2013_0305 .png). Subsequent captures numbered 002, 003, 004, etc. (e.g. Screenshot - 2013_0305 002.png). I expected the first capture to have filename Screenshot - 2013_0305 001.png.
3) Navigating hierarchy in Preferences dialog using arrow keys - Pressing down arrow moves down the list and jumps across sections, as expected. Using the up arrow key moves up, but will not jump across sections. I expected to be able to arrow up between sections. Also, left arrow jumps to the top of list within the section, but does not collapse a section. Expected that using left arrow would highlight the section header and second left arrow would collapse the section. Then arrow up would move cursor to bottom of the prior section. I expected the navigation to work like Windows Explorer.
Other than these, I don't notice any other issues or regressions.