[FLIRC disconnected after going to sleep]

Seems I have the same issue with wake up on Chromebox Openelec.I loaded configuration saved from my v1 Flirc and also tried setting it up from scratch. v1 is OK, same configuration on v2. I noticed that flirc_util shows "sleep detection:  NA" when dumping settings:

Flirc v1: 

flirc_util version v2.0.4 [v2.0.4+]
  Firmware: v3.5.0 [0x77E94DBB]

Settings:
  sleep detection:  Enabled
  noise canceler:   Disabled
  inter-key delay:  3
  seq. modifiers:   Enabled
  variant:          Unknown
  builtin profiles: Enable

Flirc v2:

flirc_util version v2.0.4 [v2.0.4+]
  Firmware: v4.0.5 [0x98DF4099]

Settings:
  sleep detection:  NA
  noise canceler:   NA
  inter-key delay:  NA
  seq. modifiers:   NA
  variant:          Flirc
  builtin profiles: NA
  Memory Info:      NA

The GUI application shows all checkboxes in the advanced settings checked but toggling any doesn't take effect. Inter-key delay in GUI shows blank and changing it doesn't take any effect either. Force-updated firmware with sleep detection enabled - no change, still NAs in all settings.

I'll have to return my new Flirc and it's pity because I really like the new size and design but we'll have to wait until it's resolved.

[flirc.exe crashes upon launching]

Have the same issue. Win7 64-bit. Had the utility installed for one day, barely had the device configured. Moved my USB keyboard to the Kodi box (to test Ctrl+F12 suspend) and then re-attached it to a different USB port. That triggered Windows keyboard driver installation process and I guess messed up something in the USB driver chain. Tried re-installing, removing the driver and re-installing, different compatibility options and tried the ZADIG utility.