Where are all my connections and preferences stored ? A: Remmina stores its configuration file in directories identified according the XDG Base Directory Specification.
A main configuration file remmina.pref is stored into $XDG_CONFIG_HOME/remmina/ directory, which defaults to $HOME/.config/remmina/.
Every single connection profile is stored into a XXXXXXXXXXXXX.remmina file under $XDG_DATA_HOME/remmina directory, which defaults to $HOME/.local/share/remmina.
Older versions of remmina used to store all *.remmina and remmina.pref files under $HOME/.remmina. If a newer version of remmina finds an existing $HOME/.remmina/ legacy directory, then remmina will revert back to use it.
Can I start a connection using a shell command ? A: Yes, use remmina -c filename.
When I'm in fullscreen mode, I cannot see the "floating toolbar" (the bar at the top of the screen), or I can see part of it but it does not scroll down or receive my input. A: You are using Gnome Shell and an older version of remmina. This has been fixed under remmina 1.2.0-rcgit.3 compiled with GTK+ 3.10 or newer. Please restart your system after upgrading remmina.
The "Quality settings" in Remmina preferences -> RDP is not saving the default quality setting. A: This is a quality profile editor, not a quality chooser. See issue #521 (closed)
I'm unable to escape from VMware vSphere client console pressing Ctrl+Alt. A: You are probably pushing the Ctrl key on the right side of the keyboard. That key is reserved as Remmina Host key. Use the left Ctrl key or change the host key in the Remmina global settings.