All the LW 5 & LPE versions suffer same issue, if not used for 30 or more days, as soon as you open the program it will delete the connection file as its opening.
I created LimeStart (for MacOSX a year ago) and several days ago for Windows. The Windows LimeStart operation is not quite as elegant or silent but it works fine. LimeStart changes the connection file's date so LW will not delete the file, then it launches LW.

I have LW on several Windows (2000, XP, 7, 8) and often had that problem of the connection file being deleted. The connection window would be empty, ie: LW not attempting to connect to any hosts because it had no list of hosts to connect to.

Good to hear you got connection back.

If sleepybear91's last connection was just a couple of weeks earlier, I'm not sure the cause. On some occasions a reboot can help with connections with LW or other similar programs. On my mac, sometimes LW starts up as being firewalled and does not lose that status. A relaunch usually fixes it but if not a reboot always does.