Double Commander: compress functionality doesn't work - exception

0.3.17RC2, VBox 4.3.12. Using the compression functionality is not possible because it is interrupted by some exception (nothing else in log):

err:(win32ss/user/user32/windows/message.c:1581) Exception when calling unicode WndProc 0050C470 Msg 514 pti B1BA5380 Wndpti B1BA5380

Catching the exception (not much help):

Entered debugger on first-chance exception (Exception Code: 0xc0000005) (Page Fault)
Memory at 0x00000020 could not be read: Page not present.
kdb:> bt
Eip:
<doublecmd.exe:55040>
Frames:
<doublecmd.exe:405fff>
<doublecmd.exe:405c6b>
<doublecmd.exe:360c3c>
<doublecmd.exe:360e9b>
<doublecmd.exe:38be36>
<doublecmd.exe:26498d>
<doublecmd.exe:26b606>
<doublecmd.exe:4d9dc>
<doublecmd.exe:24483a>
<doublecmd.exe:243b0b>
<doublecmd.exe:158429>
<doublecmd.exe:166dfc>
<doublecmd.exe:1687eb>
<doublecmd.exe:ca21>
<doublecmd.exe:156443>
<doublecmd.exe:149b56>
<doublecmd.exe:14b151>
<doublecmd.exe:1b6ed6>
<doublecmd.exe:10ea39>
<user32.dll:56ccb>--- Press q to abort, any other key to continue —

<user32.dll:5705d>
<user32.dll:577d0>
<doublecmd.exe:1116b0>
<doublecmd.exe:33687>
<doublecmd.exe:33aaa>
<doublecmd.exe:600be>
<doublecmd.exe:33a60>
<doublecmd.exe:376b>
<doublecmd.exe:12b4c>
kdb:>