Make a fresh FormTools software installation after strange behaviour? (and how?)

[HRZ_UniBi]

Hello!

First problem:
I have a formtools installation running on 2.0.6. Some days ago, suddenly the Excel export stopped working. An user found out, that switching the theme fixed this. Really strange! Maybe the cache folder contains some b*llsh*t...

Second problem:
I copied the installation and the db and updated it to 2.2.1 (and also updated/replaced the modules). Now the page head is defect and i.e. the "Update" button is non-functional (I'll post a screenshot).

The installation has a long patch history from 2.0.0 on until today.

So my question is:
Is it possible to do the following

• Copy database (use the copy for safety reasons)
  
• Make a fresh install of FormTools
  
• Install the plugins, themes, ...
  
• Copy the config file from the old installation and edit the DB-info
  
• Copy the contents of the upload-folder to the new installation
  

The directory structure will have the old names. The current installation will be moved aside/renamed, so any paths have to be edited in the db or config.

Have I forgotten something, or should that work?
(Maybe the results of my questions can help to build a documention for moving installations)

With regards,

Peter.

---

Hello!

Here's the screenshot, I mentioned in my initial post...



(The text with the version number and "Update" is in yellow and not easily visible.)
With regards,

Peter.

[HRZ_UniBi]

Hello!

I made some steps forward in the last several hours:

• Do a fresh software-only install,
  
• Copy an edited config
  
• Use a copy of the production database
  

This did not work. It failed completely. Everythin I got was an empty page (HTTP code 200 and empy answer)

So I tried another thing:

• Do a fresh software install without config and leave the install-folder intact
  
• Do a normal installation (with all steps)
  
• Then drop the freshly created database
  
• Replace it with a copy of the current produtcion database
  
• Log in, upgrade all of the modules, uninstall unsupportet modules
  
• Do some housekeeping
  

Housekeeping was done via the system check extension:

• Check the files
  
• Check the hooks (2 had to be fixed)
  
• Check orphans. And now the unexpected happened:
  

  Number of tests run: 12874, total number of orphans found: 363. Click here to delete all the orphaned records / references.

What will happen if I delete the orphaned records?
@Ben: Should I post those errors to here?

With regards,

Peter.