When RestrainedLove is enabled, the startup location is ignored (and the SLURLs won't work when the viewer is called via them from an external browser). This is so that someone can't escape a RestrainedLove cage or trap by relogging... and is also why you then always relog at the location you logged off from.
Not sure what you are referring about... You can select text then either use CTRL C or the Edit --> Copy menu item to copy it, then CTRL V or Edit --> Paste menu item to paste it... In this respect, the Cool VL Viewer behaves exactly in the same way as official viewers...
With the Cool VL Viewer v1.23 and v1.24 under Linux you may also select some text and then click the middle mouse button to paste it elsewhere (but the text can only be pasted as long as it stays selected: it's a secondary, temporary paste buffer, "à la X11"...).