Dreamweaver Beachballing with RegEx

An Update on the current state of my 'testing' in case it can shed some light....

My aim is to switch two sections of code with each other ie swap the position of two divs

using Regular Expressions to identify the two divs - ($1 & $2)

save a copy of each then replace themselves in the order $2 $1

Safe Start Mac (so Dreamweaver is the only live app)

Initiate Find & Replace

Test 1 - using Literal Text not RegEx to identify coding

Find Box: Copy in section of code

Identify the two code partitions by enclosing in parenthesis.

Replace Box: - $2 $1

Result: This works - switching the two pieces of code with each other.

So no problem with Saving and Replacing Code

Test 2 - Using RegEx to identify the coding

Find Box: Copy in section of code

Identify the two code partitions by enclosing in parenthesis.

convert variable portions of the coding with the RegEx: ((\s|.)*?) ie any character inc line breaks.

Replace Box: - Literal text 'FRANK THE PLANK'

Result: This works - identifying the RegEx coding and replacing it with Literal Text

Test 3 - Combine 1 & 2 above - Identify coding using RegEx and Switch coding using Replace $

Find Box: Copy in section of code

Identify the two code partitions by enclosing in parenthesis.

convert variable portions of the coding with the RegEx: ((\s|.)*?) ie any character inc line breaks.

Replace Box: - $2 $1

Result: Dreamweaver Hangs - Beachballs.

So - though each part of the RegEx procedures work independently

Placing RegEx commands in both the find AND Replace box causes Dreamweaver to hang.

If anyone has any suggestions etc etc