Done that, just to clarify before going on to what you requested; there was no problem originally with V1 of accufeel, no problem with accufeel uninstalled (when I first uninstalled V1.08 I completely uninstalled Accufeel and tried fsx quickly to see if the effect was there) and having reinstalled V1 there is once more no problem. The only time I had a problem was with V1.08 installed.
I have temporarily re-installed V1.08 to follow your instructions regarding testing, results as follows:
With the aircraft selected 'on' in accufeel, the stability effects during the stall are altered in a negative manner.
With the aircraft selected 'off' in accufeel, the original, fde based characteristics are present.
I have already determined that with Accufeel not running at all there is no adverse effect - checked that at the uninstall point previously!
The problem as I see it is that, whereas with other effects there is the option to disable the effect by setting the slider to zero, for this effect you are making the presumption that fsx aircraft have a stable stall. This is unaffected at zero on the slider and all change is made by moving the slider towards the right (greater percentage). However, in this instance the aircraft already has an unstable stall effect and setting the slider to zero has the effect of stabilising it (unwanted). At higher percentages on the slider, the aircraft rolls more times as a result of the stall, but not as crisply as in the original fde and the original effect is lost. I have been unable to find a percentage point where the stall is unaffected in any way, and think that there should be perhaps a tick-box for this effect so that it can be turned off whilst leaving the rest of the effects active.
I'll have to leave it at that for tonight - 0400hrs start tomorrow is getting ever closer
I'll be back around tomorrow afternoon GMT and will be able to test more then if required.
Thanks for your help so far,