Is there any way to specify that the location of the Custom Document Opener is on the same portable drive as FARR?

Since I'm running FARR portably from a flash drive, to make use of the document opener, I have that on the flash drive as well... but I can't find a way to specify its location.

I tried using %APPDRIVE%\<PATH TO DOCUMENT OPENER> but that didn't work - FARR complains that it couldn't be found.

Any suggestions?

Thanks!

The problem I accidentally reported here (https://www.donationcoder.com/forum/index.php?topic=20503.msg187945#msg187945) has reappeared.  FARR appears ok on the first launch (after I hit Alt+Space, my launch string), but the second time I hit it the program freezes.  I don't have to hit anything other than Alt+Space and the freeze happens as soon as the window appears, before any history is displayed.  So I kill the process, re-start FARR, and it will happen again (always on the second launch) indefinitely until I reboot.

The first time it happened I thought it was an isolated incident, but it seems to be happening on maybe on every 4th or 5th time I start my computer (so seemingly randomly, but repeatedly).  Usually a reboot will fix it - but sometimes it takes two.

Win7 64-bit, FARR 2.80.02.  When this first happened, I disabled all of my plug-ins one by one until there were none left, but it didn't help.

Is there any information I can provide that would help pinpoint the issue?

Thanks!