Can a profile be moved from an installed TB to portable TB?

After a little more research more questions arise but they are also a bit ore specific.

With respect to invoking the profile manager it looks like you can launch the TB program as follows:
.\ThunderbirdPortable\App\Thunderbird\thunderbird.exe -p
This opens the Profile Management dialogue. Looks exactly like what happens when using the installed version. The default location for a new profile is as follows:
%APPDATA%\Thunderbird\Profiles\...random...default
where ...random... is a generated random number.

While you can specify whatever directory you want it looks like it might work if you specify the following:
.\ThunderbirdPortable\Data\profile

As indicated above an installed version of TB would use a user specific location for the default as follows:
C:\Users\\AppData\Roaming\Thunderbird\Profiles\...random....default

However, the profiles are located using a file named as follows:
C:\Users\\AppData\Roaming\Thunderbird\profiles.ini
which in my case contains data such as the following:
[General]
StartWithLastProfile=0
[Profile0]
Name=username
IsRelative=0
Path=W:\Tbird\username\Profiles\go8kejci.default
Default=1

I haven't been able to identify any file named "profiles.ini" within the file structure under the directory named "ThunderbirdPortable". This begs the question, "does ThnuderbirdPortable utilize such a file?". If so, where should it be placed?

I do notice that there is a file named "ThunderbirdPortableSettings" located as follows:
.\ThunderbirdPortable\Data\settings
Which contains the following:

[ThunderbirdPortableSettings]
AgreedToLicense=YES
LastProfileDirectory=D:\PortableApps\ThunderbirdPortable\Data\profile

Insofar as it is quite unclear how a profile can be relocated it is hard to understand the usage of a parameter that keeps track of the "last profile directory". At the same time it pretty much implies that the profile may be relocated. Insofar as the drive letter (i.e., D: above) might change whenever a portable drive is mounted it would seem that this cannot be absolute in the case of the portable drive. This causes great doubt about the ability to relocate the profile to a different location than the one where the portable TB is installed. However, that is what I'd be most interested in doing. In that, locate the profile in a directory managed by a cloud service of some kind. Is there a way to do that?

Based on some research it looks like the portable instance of TB can be invoked using a command such as the following:
.\ThunderbirdPortable\App\Thunderbird\thunderbird.exe -profile "W:\Tbird\username\Profiles\go8kejci.default"
but this is NOT a natural thing to do using the packages distributed by portableapps.com. Is it possible that a somewhat unorthodox method might be available for doing that?