Hi JG300x_Hartmann! (fellow Texan!) S!
[...Aircraft Edit, do i have to reinstall EAW v1.2 every time i want to get rid of the changes...?]
No. WOLF257 is correct. When EAW Aircraft Edit is used to make changes to the aircraft flight models, gun models, etc., I believe it writes a new ".flt" file for that aircraft and creates a "Planes.dat" file with the necessary changes. Remember that the default aircraft info in EAW is stored in the "FLT.CDF" and "DATA.CDF" files. EAW Aircraft Edit does not make any changes to these two files. So you can revert back to all default aircraft simply by deleting the new "***.flt" files and the "Planes.dat" file. Alternatively, EAW Aircraft Edit has a button at the top labeled "Import data from DATA.CDF and FLT.CDF". Clicking this causes the default aircraft data from EAW to become the numbers shown in EAW AE. "Saving the changes" when you exit will also establish the default EAW aircraft values.
You can also use EAW Aircraft Edit with ECA Control Panel 2.0. Anytime ECA CP 2.0 is opened, it does one of the following two things (I can't remember which one it is; although for your purposes it doesn't really matter-----the effect is the same!): a) writes new/overwrites all existing files to correspond to the ECA CP 2.0 values for each of the 30 aircraft in EAW that are showing in the selection slots in CP 2.0; or b) checks to see if your EAW folder contains any .flt or .dat files that don't correspond to the values for the planes that CP 2.0 is showing and then overwrites the offending files with ones containing the proper information. So if you're using ECA Control Panel 2.0, it is even easier to "undo" any changes made with AE 1.06--------you just open Control Panel 2.0, and you're back to the CP 2.0 values! (this also gets annoying when you're experimenting and you DON'T WANT TO OVERWRITE your modified files but you forget and open Control Panel by mistake! )
The same holds true for ECAO, RIP, and MSA files. To restore these, just unzip the stored files into your EAW folder (if you have your zip program configured to automatically overwrite files with the same name), or if you have these original files unzipped and stored in a "safe" place, copy and paste them into your EAW folder, choosing to replace existing files if you are prompted.