Web Browser Discussion, Browser Talk - Slimjet Web Browser Online Forum

Hello all,
When i copy userdata folder from older ver of slimjet to newer ver of slimjet, slimjet works but
when i copy userdata folder from newer ver of slimjet to older ver of slimjet, slimjet shows ERROR popup which says:
"you have some unusable profile data (not your bookmarks) from a newer version of slimjet. select yes to overwrite it. select no to quit."

For example:
Slimjet_38.0.4.0 to Slimjet_40.0.2.0 - works
Slimjet_40.0.2.0 to Slimjet_38.0.4.0 - does not work

please tell how do i fix or bypass this issue.

Thanks in advance and good day.
Bhavtosh