How to decrypt rom/storage so you can easily switch roms without format

First I would thankx to @sakhatlonda for koutiliy.zip

Steps to download file
1. Download koutility.zip from below link

- Miatoll Clouds

2. Documentation related to koutility
Read from below link (recommended)

- Ko Kernel

Steps to decrypt rom/storage
1. Flash roms
2. Flash koutility.zip tested on aosp only
3. Format data (required only first time after flashing koutility)
4. Reboot to recovery
5. Flash gapps (optional)
6. Boot into system

Congratulations your storage/rom is decrypted , you can switch roms without format

Next time when you want to switch roms

Steps
1. Wipe data,caches and dalvik caches
2. Flash rom
3. Flash koutility.zip
4. Reboot to recovery
5. Flash gapps (optional)
6. Boot into system

Notes
Remember you need to config koutility.zip in recovery

How to config koutility for decryption

-Set config (by pressing volume down)
-Yes (for edit config) by pressing volume up
-After that "No" till 5th option (by pressing volume down)
-Then "yes" for 6th option (by pressing volume up)
-Rest "No" till 16th option (by pressing volume down)
-Last "yes" to flash (by pressing volume up)