Thank you for prompt reply and advice.

My problem was related to antivirus AVG and after disabling it your mod run flawlessly.

After trying it very very briefly I have to admit that not only flight models feel better but having all altitude hold hover hold etc. features really working in the simulation one can really "stalk the prey" more efficiently and satisfactory. I hope you will continue this quest to improve EECH because so far changes you made have been really of great importance and success. Thank you.